The Similan Islands Thailand are one of those destinations where photographs almost look too perfect to be real.
Brilliant turquoise water. Powder-white sand. Enormous granite boulders. Dense tropical vegetation. Clear snorkeling water stretching into the open Andaman Sea.
Before visiting, I thought I understood what the Similan Islands were. Like many travelers, I had seen the famous photographs of Island No. 8 — the curved bay, huge granite rocks and elevated viewpoint that appear again and again in Thailand travel advertisements.
What I hadn’t fully understood was that reaching that postcard scenery is only part of the experience.
A trip to the Similan Islands takes you through an entire protected archipelago. You pass islands that tourists aren’t allowed to enter, snorkeling areas where the real attraction is underneath the water, small islands that barely appear in travel brochures, and larger islands where you can finally step onto the sand.
Only later does the famous Koh Similan, Island No. 8, appear.
That progression became one of my favorite parts of the trip.
Instead of treating the Similans as one famous beach, this guide follows the journey much closer to the way I experienced it — through the archipelago, island by island, until eventually reaching the scenery everyone recognizes.
Quick Navigation
In this Similan Islands Thailand travel guide, you’ll discover:
- What the Similan Islands actually are and why you’ll constantly hear the islands referred to by numbers
- What you may experience before reaching the famous Island No. 8
- The differences between Islands 1 through 9
- Why some islands are protected and inaccessible to normal visitors
- What to expect at Koh Miang, Island No. 4
- What snorkeling in the Similan Islands is really like
- Why Island No. 7 is closely associated with the marine side of the trip
- What makes Koh Similan, Island No. 8, the famous postcard island
- What to expect from the beach, granite boulders and viewpoint on Island 8
- What lies around Island No. 9 at the northern end of the traditional island chain
- What a full-day Similan Islands tour actually feels like
- Whether you should visit from Phuket or stay closer to Khao Lak
- How to choose a Similan Islands tour
- What to know about speedboats, waves and seasickness
- What to pack and what to leave behind
- What the islands are like for families, couples and solo travelers
- How the Similans compare with Phi Phi, Phang Nga Bay and the Surin Islands
- How to photograph and film the islands without spending the entire day looking through a camera
- Common mistakes first-time visitors should avoid
- And finally, whether the Similan Islands are really worth the long journey
Table of Contents
- My First Impression of the Similan Islands
- Understanding the Similan Islands and Their Numbers
- The Journey Into the Archipelago
- Islands 1–3: The Protected Southern Similans
- Island 4: Koh Miang
- Islands 5 and 6
- Snorkeling in the Similan Islands
- Island 7: Koh Payu
- Island 8: Koh Similan
- Sail Rock and the Famous Viewpoint
- Island 9: Koh Ba-Ngu
- What a Similan Islands Day Trip Is Really Like
- Similan Islands From Phuket vs. Khao Lak
- Choosing the Right Tour
- Speedboats, Waves and Seasickness
- Best Time to Visit
- Marine Life and Snorkeling Expectations
- Who Will Enjoy the Similan Islands Most?
- What to Bring
- Photography, Walking Videos and Drone Footage
- Protecting the Similan Islands
- Similan Islands vs. Other Thailand Island Trips
- Common Mistakes to Avoid
- A Realistic Day-Trip Itinerary
- Frequently Asked Questions
- Is Similan Islands Thailand Worth Visiting?
My First Impression of the Similan Islands
There are places in Thailand where you arrive already knowing almost exactly what you’re going to see.
You’ve seen the beach hundreds of times on Instagram, YouTube, hotel websites and travel brochures. The boat arrives, you step onto the sand, take photographs, and the place looks more or less the way you imagined.
The Similan Islands felt different.
Part of that was because the famous scenery wasn’t immediately in front of me.
When most people hear Similan Islands, they picture one particular landscape: intensely blue water, bright white sand, giant rounded granite boulders and a high viewpoint overlooking the bay.
That is primarily Koh Similan — Island No. 8.
But you don’t simply leave the mainland and suddenly appear there.
You travel into an archipelago.
The farther the boat moved away from the mainland, the more the trip began to feel less like transportation and more like part of the experience.
Buildings disappeared.
The coastline became smaller.
Eventually there was nothing around us but open Andaman Sea.
Then islands started appearing on the horizon.
At first they looked like distant green shapes sitting in the ocean.
As we approached, details started emerging.
Granite rocks.
Small beaches.
Dense tropical forest.
And perhaps most noticeably, the changing color of the water.
Dark ocean blue gradually became lighter.
Then turquoise.
Near some beaches and shallow areas, it became almost transparent.
That gradual reveal was one of the things I remembered most afterward.
I had expected one spectacular island.
Instead, the journey itself kept changing.
Understanding the Similan Islands and Their Numbers
One of the easiest mistakes to make when planning this trip is assuming that Similan Island and Similan Islands mean the same thing.
They don’t.
The traditional Similan island chain consists of nine numbered islands stretching roughly south to north through the Andaman Sea.
You may see slightly different English spellings depending on the map or tour company, but the traditional numbered chain is generally shown as:
Island 1 – Koh Huyong
Island 2 – Koh Payang
Island 3 – Koh Payan
Island 4 – Koh Miang
Island 5 – Koh Ha
Island 6 – Koh Hok
Island 7 – Koh Payu
Island 8 – Koh Similan
Island 9 – Koh Ba-Ngu
The wider national park extends beyond the original numbered nine-island chain, which is why travelers occasionally encounter other islands such as Koh Bon or Koh Tachai when researching the region.
For a first-time visitor, however, Islands 1 through 9 are the easiest way to understand the traditional Similan group.
And once you’re actually on the tour, the numbers become useful.
Your guide might say:
“Island 4.”
“Island 7.”
“Island 8.”
At first it sounds strangely clinical for such a beautiful tropical destination.
After a while, it makes perfect sense.
Each part of the chain plays a different role.
Some islands are heavily protected.
Some are associated mainly with snorkeling.
Some allow visitors onto the beach.
And Island 8 contains the landscape that turned the Similans into one of Thailand’s most recognizable island destinations.
The Journey Into the Similan Islands
The distance is one reason the Similan Islands still feel very different from many excursions around Phuket.
This isn’t a twenty-minute ride to a nearby beach.
Once the speedboat leaves the mainland, you’re heading into genuinely open water.
There can be a stretch where there isn’t much to look at except ocean.
At first that part may feel long.
But it creates anticipation.
Then the first island appears.
The experience changes immediately.
One minute you’re crossing deep blue open water.
The next you’re approaching forest-covered land surrounded by lighter turquoise sea.
From above, that transition is even more dramatic.
You can often see the water changing color with depth — deep blue offshore, lighter blue around the island, then bright turquoise over shallower sand or reef.
That’s one reason I consider my Similan Islands drone footage among the most valuable footage I’ve captured in Thailand.
The drone doesn’t simply make the islands look prettier.
It explains the geography.
You see how isolated they really are.
You see how small the beaches look compared with the surrounding ocean.
You see where granite rock meets jungle, where jungle meets sand, and where turquoise water suddenly becomes deep blue.
The aerial perspective tells a completely different story from the one you see standing on the beach.
Islands 1–3: The Protected Southern Similans
The southern section of the traditional island chain begins with Koh Huyong, Koh Payang and Koh Payan.
My tour map clearly marked this area as a protected turtle-conservation zone with restricted access.
That stood out to me immediately.
In many heavily visited parts of Thailand, tourism reaches almost everywhere.
A beautiful beach is discovered.
Boats begin arriving.
Then restaurants.
Then hotels.
Then more boats.
The southern Similans remind you that a national park isn’t supposed to function entirely for tourists.
Some places remain protected because conservation comes first.
And I actually think that makes the Similans more valuable.
You do not need to physically stand on every island in order to appreciate the archipelago.
Island 1 – Koh Huyong
Koh Huyong sits at the southern end of the traditional island chain.
For most visitors, this is not somewhere you should expect to land and spend time walking around.
Its conservation importance is part of the reason access is restricted.
Instead of thinking of that as something you’re missing, I think it is better understood as part of what keeps the national park functioning as a protected environment.
Islands 2 and 3 – Koh Payang and Koh Payan
These islands continue through the southern protected part of the chain.
They aren’t the names most travelers remember afterward.
They don’t have the publicity of Island 8.
And that is perfectly fine.
Together with Island 1, they establish the character of the southern Similans before the normal visitor route reaches the more accessible sections of the archipelago.
This was when I began realizing that the trip wasn’t about collecting islands like checkpoints.
It was about moving through one connected marine environment.
Island 4 – Koh Miang: Where the Trip Changes
Then you reach Koh Miang, Island No. 4.
This is where the experience becomes much more tangible.
Instead of simply viewing islands from the boat or snorkeling offshore, Koh Miang gives visitors the opportunity to actually step onto land and spend time in one of the main visitor areas of the national park.
But don’t picture a developed Thai resort island.
You won’t find an endless row of hotels, motorbikes, beach clubs or convenience stores.
Nature still dominates the surroundings.
Forest rises behind the sand.
Clear water sits directly in front of you.
There is enough visitor infrastructure to handle tour groups, but the island still feels fundamentally like part of a national park rather than a resort destination.
That distinction matters.
After spending time crossing open sea, simply being able to walk again feels surprisingly good.
You can slow down.
Feel the sand.
Explore.
Get away from the constant engine sound of the speedboat.
And experience the island at human speed rather than boat speed.
The Water Around Koh Miang
Thailand has no shortage of beautiful water.
I’ve seen clear water around Phi Phi, Hong Island, Koh Nang Yuan, the Surin Islands and many smaller islands.
But the Similans have a particular visual quality.
The water rarely looks like one consistent shade.
Farther offshore it may appear dark blue.
Closer to the island it becomes brighter.
Near shallow areas, the color can shift toward intense turquoise.
And where pale sand sits beneath shallow water, the sea can become almost transparent.
This effect is especially noticeable on a sunny day.
Sometimes the colors look almost exaggerated even before you’ve touched an editing slider.
That’s one reason aerial footage can be so striking here.
From the ground you see beautiful turquoise water.
From the drone you see the entire transition from deep ocean to shallow reef to white beach.
Koh Miang Is More Than a Lunch Stop
Depending on your tour, Koh Miang may be used for lunch, swimming, relaxing or exploring.
It would be easy to think of it as downtime between snorkeling stops.
I wouldn’t.
This is one of the places where slowing down actually improves the experience.
Walking footage becomes particularly useful here.
A drone can show how beautiful the island is.
A walking video shows what it feels like to actually be there.
How wide is the beach?
How many people are around?
How close are the boats?
How much vegetation surrounds the visitor area?
What does the shoreline look like when you’re standing on it rather than flying above it?
For a travel guide, both perspectives matter.
The drone shows the fantasy.
The walking footage shows the reality.
And in the Similans, both are beautiful for different reasons.
Islands 5 and 6 – Koh Ha and Koh Hok
North of Koh Miang are the smaller Islands 5 and 6.
These are the kinds of islands that easily disappear from generic travel articles because they don’t have the same famous viewpoint or instantly recognizable beach.
But smaller islands are part of what gives the Similan chain its character.
From the boat, they reinforce the feeling that you’re traveling through an archipelago instead of commuting between two major attractions.
You look ahead and see another green island rising from the water.
Then another.
Some have exposed granite.
Some are surrounded by reef.
Some are far more interesting from the water than they would be from land.
Not every island needs a restaurant, viewpoint or Instagram landmark attached to it.
Sometimes its value is simply being part of the landscape.
Snorkeling in the Similan Islands
You could visit the Similan Islands only for the beaches and scenery and still have a memorable day.
But you would be missing a major part of the destination.
The Similans are just as much about what exists underneath the water as what sits above it.
This is where the speedboat stops being transportation and becomes your base for exploring the marine environment.
The crew prepares masks, snorkels, fins and life jackets.
Then you look over the side.
On a good day, the water can be clear enough that you already see beneath the surface before you enter.
Once you’re in the water, everything changes again.
From the speedboat, a snorkeling site may look like nothing more than another patch of blue beside an island.
Below the surface, you begin seeing reef structure, fish, rock formations, changing depths and sunlight moving through the water.
Visibility Can Transform the Experience
Water clarity matters tremendously when snorkeling.
When visibility is good, you don’t need to swim directly on top of something to see it.
Fish appear farther away.
Rock formations become easier to follow.
The bottom may remain visible beneath you.
And casual snorkelers can enjoy the experience without constantly searching for something interesting.
Of course, visibility changes.
Weather changes.
Currents change.
Sunlight changes.
Marine life moves.
That’s nature.
I wouldn’t promise anybody that every snorkeling stop will look exactly like a promotional photograph.
But when conditions cooperate, the Similans are the kind of place where snorkeling becomes one of the main events rather than something added to the itinerary simply to fill time.
Island 7 – Koh Payu
Koh Payu, Island No. 7, sits just south of the most famous island in the traditional chain.
By the time you reach this part of the trip, you have already experienced several different sides of the Similans.
Protected southern islands.
Visitor areas.
Open-water crossings.
Snorkeling.
Changing water colors.
And now Island 8 is getting closer.
But Island 7 shouldn’t be thought of simply as the island before the main attraction.
The surrounding waters are part of the marine experience that makes the national park so well known among snorkelers and divers.
This is also where your expectations determine whether you appreciate the trip.
If your idea of an island tour is:
boat,
beach,
photo,
boat,
next beach,
then parts of the Similan itinerary might feel unusual.
You don’t step onto every island.
Some of the best stops happen offshore.
Sometimes the attraction is underneath you rather than in front of you.
For people who genuinely enjoy being in the water, that makes the day better, not worse.
Then Island No. 8 Appears
Eventually you reach Koh Similan — Island No. 8.
This is the island most travelers have been waiting for.
Even after everything I had already seen earlier in the day, the change in scenery was immediate.
The granite formations dominate the landscape.
They don’t look like the limestone cliffs around Phi Phi, Hong Island or Phang Nga Bay.
They’re rounded.
Massive.
Smooth-looking from a distance.
Some appear stacked on top of one another.
Others look almost impossibly balanced.
Against white sand, intensely blue water and dense green vegetation, those granite boulders create a landscape that is unmistakably Similan.
This is when the place you’ve seen countless times online finally becomes real.
And arriving after already traveling through other parts of the archipelago made it more impressive.
If Island 8 had simply been the first beach of the day, it still would have been beautiful.
But reaching it as the visual climax of a longer journey gave the experience much more context.
Why Koh Similan Looks Different From Most Famous Thai Islands
Many of southern Thailand’s best-known landscapes are dominated by limestone.
Think about:
Phi Phi.
Phang Nga Bay.
James Bond Island.
Hong Island.
Those destinations are defined by vertical karst cliffs, caves, dramatic towers and sharp limestone formations.
The Similans look completely different.
Granite gives the islands a softer but still dramatic visual identity.
Instead of towering vertical walls, you see enormous rounded boulders sitting between forest and sea.
Some extend into the water.
Some form natural boundaries around beaches.
Others emerge from the vegetation.
From above, the effect is remarkable.
You can see exactly how the granite formations shape the coastline.
This is why I don’t think drone footage is merely a bonus here.
It reveals something you cannot fully understand from beach level.
Sail Rock and the Famous Similan Viewpoint
Sooner or later, nearly everybody visiting Island 8 becomes interested in the same place.
The famous elevated viewpoint associated with Sail Rock.
Even travelers who don’t know its name usually recognize the view.
Turquoise water below.
Boats floating in the bay.
A bright white beach.
Huge granite formations.
Dense green vegetation.
And open Andaman Sea extending toward the horizon.
It is probably the single most recognizable image from the Similan Islands.
But photographs hide part of the experience.
They show you the finished view.
They don’t show you the heat.
They don’t show people stopping to take pictures.
They don’t show the uneven terrain.
They don’t show the transition from standing on the beach to gradually climbing higher above it.
And that progression is part of what makes the viewpoint enjoyable.
At sea level, the beach and rocks dominate your attention.
As you climb, the bay slowly opens up beneath you.
Boats shrink.
Different shades of blue become easier to see.
The granite formations begin making geographical sense.
By the time you’re looking down over the bay, you understand exactly why this image became the visual symbol of the Similan Islands.
Should Everyone Climb to the Viewpoint?
No.
The view is spectacular, but no attraction is mandatory.
If you have mobility problems, dislike climbing, aren’t comfortable with the terrain or simply prefer spending your limited time swimming, staying near the beach doesn’t mean you’re wasting your visit.
Travel sometimes becomes unnecessarily competitive.
People feel like they need to complete every viewpoint and check every box.
You don’t.
Do what improves your experience.
The beach below is already beautiful enough to justify the stop.
The Beach on Island 8
From ground level, Island 8 has a completely different personality.
The granite boulders suddenly become enormous.
What looked like small decorative shapes from the drone become huge formations beside you.
The water appears bright even without an elevated view.
Forest rises directly behind the sand.
Boats sit offshore.
People swim.
Others head toward the viewpoint.
There are many beautiful beaches in Thailand.
But relatively few combine:
granite boulders,
tropical forest,
white sand,
clear water,
and open-ocean scenery
in quite the same way.
That’s what makes Island 8 memorable.
It isn’t one feature.
It’s the complete setting.
Island 9 – Koh Ba-Ngu
North of Koh Similan sits Koh Ba-Ngu, Island No. 9, the final island in the traditional numbered chain.
By this point, the character of the trip has changed several times.
You began around protected southern areas.
Moved through visitor islands.
Snorkeled around reefs.
Reached the dramatic granite scenery of Island 8.
And now you’re approaching the northern end of the original Similan group.
Around Island 9, once again, the marine environment is often more important than the idea of stepping onto land.
And that reinforces an important point.
The Similan Islands aren’t a checklist destination.
You don’t need:
Island 1 — done.
Island 2 — done.
Island 3 — done.
Sometimes the best view is from the beach.
Sometimes from the speedboat.
Sometimes from above.
And sometimes the most interesting part of an island is underneath the water.
What Surprised Me Most About the Similan Islands
Before the trip, I expected Island 8 to be the highlight.
Visually, it absolutely deserves its reputation.
What surprised me was how much everything before Island 8 contributed to the day.
Had the boat simply transported me directly to the famous beach and back, I would still have thought the place was beautiful.
But I wouldn’t have really understood the Similan Islands.
Traveling through different parts of the chain changes your perception.
You begin seeing the destination as a marine national park rather than simply another beach excursion sold from Phuket.
There is a real sense of distance.
A sense of isolation.
And a sense that the environment continues far beyond whichever little stretch of sand you’re standing on.
That feeling has become increasingly difficult to find in Thailand’s most heavily developed tourism areas.
It is one of the reasons the Similans stayed in my memory after the trip ended.
What a Similan Islands Day Trip Is Actually Like
A tour looks simple when reduced to an itinerary.
Hotel pickup.
Pier.
Speedboat.
Snorkeling.
Lunch.
Beach.
Island 8.
Return.
The actual day feels considerably bigger.
The biggest difference is the distance.
This isn’t one of those Phuket tours where you’re standing on the first island shortly after breakfast.
You commit to the day.
If you’re staying in Phuket, that can mean an early hotel pickup followed by a road transfer north before you even reach the speedboat.
Then comes the offshore journey.
Only after that does the island portion begin.
At the end of the afternoon, everything happens in reverse.
Boat back to the mainland.
Transfer back toward your hotel.
Shower.
Food.
And probably very little interest in doing anything complicated that evening.
It’s a full travel day disguised as an island tour.
And I mean that positively.
Similan Islands From Phuket: Is the Journey Worth It?
This is probably one of the biggest questions for travelers staying in Phuket.
There are much easier island excursions available.
You can reach nearby beaches and smaller islands without committing to such a long day.
If your only goal is:
“I want a beautiful beach for a few hours,”
you don’t necessarily need the Similans.
Phuket already has beautiful beaches.
There are closer islands.
There are easier tours.
The Similans make sense when you want the complete environment.
The open-ocean journey.
The national park.
The clear offshore water.
The snorkeling.
The granite formations.
The island chain.
And finally, Island 8.
For me, the destination looked different enough from Phuket to justify the extra effort.
That is the important part.
If the scenery had felt like another Phuket beach with a longer commute, I would have felt very differently.
It didn’t.
Staying in Khao Lak Can Make the Trip Easier
If the Similan Islands are one of the major priorities of your vacation, staying around Khao Lak can make the logistics considerably easier.
The main departure area is on the Phang Nga mainland side, meaning travelers based around Khao Lak avoid much of the early-morning drive from Phuket.
That can mean:
a later wake-up,
less time sitting in a van,
and a faster return to your hotel after the tour.
I wouldn’t necessarily move hotels only for the Similans if your entire trip is based in Phuket.
Changing hotels creates its own inconvenience.
But if Khao Lak is already part of your itinerary, scheduling the Similan tour while staying there makes geographical sense.
Choosing the Right Similan Islands Tour
Not every tour creates exactly the same experience.
The broad itinerary may be similar between operators, but details matter.
I would look beyond the cheapest advertised price.
Important questions include:
How many passengers are on the boat?
Which islands and snorkeling areas are included?
How much actual time do you spend at each stop?
Are national park fees included?
Is hotel transportation included?
Is snorkeling equipment provided?
What food and drinks are included?
What happens if weather forces a cancellation?
What type of boat is being used?
You are already committing an entire day.
Saving a small amount doesn’t help much if the trip feels overcrowded and rushed.
Don’t Choose a Tour Only by the Number of Stops
Tour advertisements love numbers.
Four islands.
Three snorkeling stops.
Seven locations.
More sounds better.
It isn’t always.
I’d rather have enough time to enjoy a smaller number of excellent locations than spend the entire day boarding and leaving the boat.
The Similans are too beautiful to experience like a race.
Look for balance.
Snorkeling.
Beach time.
Island 4.
Island 8.
Enough time to actually enjoy where you are.
Why Group Size Matters
A large tour group affects more than simply how crowded the boat feels.
Every transition takes longer.
Getting twenty people into the water takes time.
Getting everyone back onboard takes time.
Waiting for somebody to find a missing fin takes time.
Waiting for somebody who hasn’t returned from the viewpoint takes time.
Individually, these delays seem minor.
Across a full day, they add up.
A smaller group doesn’t guarantee a better tour, but group size is worth considering.
Speedboat vs. Larger Boat
For many visitors, a speedboat is the most practical way to reach the Similans because of the distance.
The advantage is obvious.
Speed.
The disadvantage is also obvious once the sea becomes choppy.
Comfort.
A larger vessel may feel more stable, but usually requires more travel time.
Neither option is automatically better.
It depends on your priorities.
If maximizing island time matters most, speedboats are attractive.
If you’re especially sensitive to rough water, comfort may matter more than saving time.
The Speedboat Ride Is Something People Underestimate
The Similans sit well offshore.
That means you’re more exposed to the open Andaman Sea than you are inside sheltered areas such as Phang Nga Bay.
On a calm morning, the ride can be comfortable.
On a rougher day, the experience changes completely.
If you suffer from motion sickness, don’t treat this like a minor detail.
Prepare before departure.
Sitting nearer the middle or rear of a speedboat can sometimes feel less aggressive than being at the bow, where the vertical movement is often more noticeable.
The front may have the exciting view.
It can also give you the full experience of every wave.
Best Time to Visit the Similan Islands
The Similans are not a year-round destination in the same sense as many Phuket beaches.
The national park operates seasonally and normally closes during the rougher monsoon period.
That matters for two reasons.
First, the open-sea conditions can become unsuitable for regular tourism.
Second, the seasonal closure reduces visitor pressure on the marine environment.
If the Similan Islands are one of the main reasons for your Thailand trip, always verify the current national park opening status before locking in your travel dates.
Don’t assume that because Phuket is open, the Similans must also be open.
Weather Matters More Than Most People Realize
Even during the open season, conditions vary enormously.
Travel photographs create the impression that the sea always looks electric blue.
It doesn’t.
Sunlight matters.
Cloud cover matters.
Wind matters.
Visibility matters.
The same bay can look intensely turquoise on a sunny day and much darker under overcast skies.
That doesn’t mean the island stopped being beautiful.
It means tropical scenery depends heavily on light.
The same is true underwater.
One snorkeling session may have exceptional visibility.
Another may be less clear.
Nature doesn’t follow the brochure.
Don’t Judge the Day From the Morning Sky
One thing I’ve learned from island travel in Thailand is that weather near your hotel doesn’t always predict conditions far offshore.
You can leave Phuket under clouds and reach brighter weather offshore.
You can also leave under perfect blue skies and encounter changing conditions later.
The Similans are far enough into the Andaman Sea that conditions may differ noticeably from the mainland.
Unless the operator determines that conditions are unsafe, a cloudy hotel pickup doesn’t automatically mean the day is ruined.
Snorkeling: Who Will Enjoy It Most?
You don’t need to be an expert swimmer to enjoy snorkeling in the Similans.
But being comfortable in open water helps.
Organized tours generally provide life jackets and basic snorkeling equipment.
If you aren’t a strong swimmer, use the life jacket.
Open-water snorkeling feels completely different from swimming in a hotel pool.
You may encounter:
waves,
current,
deep water,
other swimmers,
and boats nearby.
For somebody snorkeling offshore for the first time, that can feel intimidating.
Tell the guide if you’re uncomfortable.
There is no benefit in pretending otherwise.
If You’re a Strong Swimmer
Confident swimmers have more flexibility.
You can move around more naturally.
Explore reef edges.
Position yourself better for photographs.
And spend less time worrying about your flotation.
But confidence shouldn’t become carelessness.
I still keep track of a few simple things:
Where is the boat?
Where is the guide?
How far have I drifted?
Which direction is the current moving?
Open-ocean snorkeling deserves more awareness than swimming from a normal beach.
What Marine Life Can You See?
This is where travel articles often overpromise.
The Similans are known for marine life.
That doesn’t mean every visitor will see the same animals.
You are not guaranteed a turtle.
You are not guaranteed a shark.
You are not guaranteed huge schools of colorful fish at every stop.
Wildlife isn’t scheduled around the tour itinerary.
Sometimes the fish are the highlight.
Sometimes visibility.
Sometimes underwater rock formations.
Sometimes the coral environment.
Go in hoping to see marine life rather than expecting specific animals on demand.
You’ll enjoy the experience much more.
Diving in the Similan Islands
Most day-trip visitors experience the Similans through snorkeling, beaches and sightseeing.
For certified divers, the region becomes something much bigger.
The formations visible above the surface continue underwater.
Dive sites extend into deeper environments.
And multi-day liveaboard trips allow divers to explore areas in a completely different way from ordinary day visitors.
For a casual traveler, a liveaboard would be unnecessary.
For somebody traveling specifically to dive, the Similan region can become the centerpiece of the entire trip.
You definitely do not need scuba equipment to appreciate the islands.
But knowing how much of the environment continues underwater helps explain why the Similans have such a strong reputation among divers.
Who Will Enjoy the Similan Islands Most?
The Similans aren’t automatically the perfect excursion for every traveler.
Your interests matter.
Solo Travelers
This is an easy destination for solo travelers because nearly everything is organized.
Transportation.
Boat.
Guide.
Equipment.
Itinerary.
You can interact with other passengers if you want, or spend much of the day snorkeling, filming and exploring independently.
My biggest advice is to keep your valuables simple.
There isn’t always somebody available to watch an expensive camera bag while you’re in the water.
A small dry bag or waterproof storage becomes useful very quickly.
Couples
For couples who enjoy active travel, the Similans can be an excellent day.
You aren’t simply sitting on one beach.
You’re traveling.
Snorkeling.
Walking.
Swimming.
Climbing to viewpoints.
Exploring several environments.
I wouldn’t describe it as a lazy honeymoon day.
It’s more adventure than relaxation.
If that’s your style, great.
If your ideal romantic day involves a private cabana and almost no movement, this may not be the excursion you’re looking for.
Families
Families with older children who enjoy boats and swimming may love the Similans.
Very young children require more thought.
The day is long.
The speedboat can be rough.
There are repeated boat entries and exits.
Much of the experience revolves around water.
I would judge suitability less by whether something is officially “family friendly” and more by how comfortable your own children are with long active days.
Older Travelers
Age alone isn’t the important factor.
Mobility is.
Getting on and off moving boats requires balance.
The viewpoint involves uneven terrain.
Beach landings may require walking through shallow water.
Some travelers in their seventies may handle the day easily.
A younger traveler with significant knee, back or balance problems may find it difficult.
Judge the trip based on mobility rather than the number on your passport.
Who Might Prefer a Different Island Trip?
You may want to choose something easier if you:
strongly dislike boats,
suffer severe motion sickness,
have no interest in snorkeling,
have significant mobility problems,
hate early mornings,
or mainly want to lie on one beach for several hours.
There are easier options around Phuket.
And that’s okay.
Travel should match the traveler.
What to Bring to the Similan Islands
You don’t need to carry half your hotel room.
The lighter your bag, the easier the day becomes.
My essentials would be:
Sunscreen. The combination of tropical sun and reflection from the sea can be intense.
Sunglasses. The brightness over the water becomes tiring faster than you might expect.
Hat. Useful on the beach, although loose hats and speedboats aren’t always friends.
Swimwear. I would wear it underneath my clothes from the beginning.
Quick-drying clothing. You’re likely to get wet several times.
Waterproof phone pouch. One of the simplest useful items you can carry.
Small dry bag. Especially valuable if you’re carrying batteries, cameras, wallets or other electronics.
Extra batteries. The Similans are exactly the kind of destination where you suddenly realize you’ve filmed too much and have 12% battery left.
Motion sickness medication if needed. Don’t discover halfway across the Andaman Sea that you wish you had brought it.
A lightweight towel or dry shirt. The return journey is more comfortable when you aren’t sitting in wet clothing.
What I Would Leave at the Hotel
A giant backpack.
Unnecessary electronics.
Heavy clothing.
Anything that becomes a problem when wet.
Remember that you’ll be moving between vehicles, speedboats, beaches and possibly viewpoints.
The heavier and more complicated your equipment becomes, the more attention you spend protecting it instead of enjoying the islands.
Should You Bring Your Own Snorkeling Gear?
Most organized tours provide basic snorkeling equipment.
For an occasional snorkeler, that’s usually enough.
If you snorkel regularly and already own a mask that fits you perfectly, bringing your own can make the experience more comfortable.
A leaking mask can turn excellent visibility into twenty minutes of constantly clearing water from your face.
Your own equipment eliminates that uncertainty.
But I wouldn’t buy an entire snorkeling setup specifically for one day unless you expect to use it again.
Photography in the Similan Islands
The Similans are almost unfairly photogenic.
The obvious photographs are obvious for a reason.
Island 8.
Granite boulders.
Turquoise water.
The viewpoint.
Get them.
But don’t ignore the moments in between.
Some of my favorite travel footage often comes from transitions.
An island gradually getting larger as the boat approaches.
The color of the water changing beneath the speedboat.
People preparing to jump into the sea.
Granite formations emerging behind trees.
Boats sitting offshore.
A walk from the visitor area toward the beach.
Those moments tell the story of the day.
The postcard photograph tells people where you went.
The transitions show them what it felt like to get there.
Why Drone Footage Changes the Similan Islands Completely
There are places where a drone simply gives you a prettier version of the same view you already had from the ground.
The Similans aren’t like that.
From above, you understand things that are almost impossible to appreciate from beach level.
You see the water changing depth.
You see beaches wrapped between granite and forest.
You see how small people look beside the boulders.
You see boats scattered around the bay.
And you see just how much open ocean surrounds these islands.
At ground level, you’re visiting a beautiful beach.
At altitude, you’re looking at a tiny island sitting in an enormous sea.
That change in perspective is powerful.
Walking Videos Tell a Different Story
If drone footage shows the dream, walking footage shows the experience.
And that’s extremely valuable in a travel guide.
Walking footage answers questions aerial video can’t.
How crowded is the beach?
How large are those boulders?
How far are the boats from shore?
How wide is the sand?
What does the visitor area actually look like?
What is the atmosphere like?
For somebody deciding whether to book the trip, a natural walking video may actually be more useful than another cinematic flyover.
That’s why I like having both.
If You’re Filming, Don’t Try to Capture Everything
A place this beautiful can create the opposite problem from not having enough to film.
You start recording everything.
Phone.
Drone.
Action camera.
Main camera.
Another phone clip.
Another drone angle.
Another walk.
Then suddenly you’ve spent half the day looking through screens.
I’ve done this enough to know the feeling.
A better approach is to decide what each camera is responsible for.
The drone captures geography.
The action camera captures snorkeling.
The phone captures spontaneous moments and walking footage.
Then put them down occasionally.
If you’ve already filmed ten minutes of turquoise water, another fifteen minutes probably isn’t going to change your final video.
Swim.
Look around.
Experience the place.
Some travel memories are better because you weren’t trying to record them.
Drone Rules and National Park Permissions
Because the Similan Islands are inside Mu Ko Similan National Park, drone flying should never be treated casually.
Thailand has aviation requirements for drone operation, and protected national park areas can involve additional permission requirements.
If you’re planning to fly, check the current rules before your trip and obtain whatever permissions are required for your planned flight.
Do not assume that seeing drone videos online means anybody can arrive on Island 8 and immediately launch.
I had taken care of the necessary national park drone permissions for my own flights, and for me the preparation was worth it because the aerial perspective adds so much here.
The footage comes after the preparation.
Not instead of it.
Protecting the Similan Islands
One thing I appreciated about the Similans is that they still feel fundamentally like a protected environment.
Tourism is clearly present.
There are boats.
Guides.
Visitor facilities.
Crowds in popular places.
But tourism doesn’t dominate every part of the archipelago.
Certain areas remain off-limits.
The park closes seasonally.
You aren’t surrounded by resorts.
There aren’t roads and motorbikes running across the islands.
That absence is part of what makes the destination special.
And visitors have a responsibility to help keep it that way.
Don’t touch coral.
Don’t stand on coral.
Don’t chase marine animals.
Don’t remove shells, coral or anything else from the environment.
Don’t leave plastic behind.
Don’t feed marine life simply to create photographs.
The easiest underwater rule is:
look, don’t touch.
Coral may resemble rock.
It isn’t.
Something that has taken years to grow can be damaged very quickly by careless contact.
Similan Islands vs. Surin Islands
This is one of the most useful comparisons for travelers exploring Thailand’s Andaman side.
I’ve experienced both, and I wouldn’t describe them as interchangeable.
Both are protected offshore marine destinations.
Both offer clear water.
Both involve long travel days.
Both are known for snorkeling.
But they feel different.
The Similans have a stronger above-water visual identity.
Island 8, the granite formations, white beaches and famous viewpoint give the archipelago an immediate “wow” factor.
The Surin Islands have a different atmosphere.
Snorkeling becomes a major focus, and the Moken village adds a cultural dimension that you don’t experience in the same way in the Similans.
For photography and dramatic above-water scenery, the Similans are particularly strong.
For a combination of marine exploration and the additional cultural element associated with the Moken community, the Surins offer something different.
I don’t think one makes the other unnecessary.
They’re two separate experiences.
Similan Islands vs. Phi Phi Islands
Phi Phi and the Similans are often grouped together because both are famous island excursions from the wider Phuket region.
Once you’re there, they don’t feel alike.
Phi Phi is dominated by limestone.
Vertical cliffs.
Enclosed bays.
Famous beaches.
Villages.
Heavy tourism infrastructure.
The Similans feel much more open.
Granite replaces limestone.
Snorkeling becomes more central.
The sea feels larger.
Development is limited by the national park environment.
Phi Phi gives you dramatic cliffs and famous bays.
The Similans give you granite formations, open-ocean scenery and a stronger sense of traveling through a marine park.
If your itinerary allows both, I don’t think you have to choose between them.
They’re different enough to justify separate days.
Similan Islands vs. Phang Nga Bay
This comparison is even easier.
Phang Nga Bay is about limestone formations rising out of relatively sheltered water.
Caves.
Mangroves.
Karst towers.
Floating communities.
The Similan Islands are about the open Andaman Sea.
Granite.
White sand.
Clear snorkeling water.
Remote islands.
You could visit both and never feel as if you repeated the same trip.
How to Fit the Similan Islands Into a Phuket Itinerary
If you’re staying in Phuket for only two or three days, giving one entire day to the Similans is a significant commitment.
That doesn’t mean you shouldn’t do it.
It simply means you should understand the tradeoff.
One Similan day could otherwise be used for Phuket beaches, Old Phuket Town, viewpoints, restaurants or another island trip.
With five to seven days in Phuket, the decision becomes easier.
You have enough time to give one day to the Similans without feeling as if you’ve missed the rest of Phuket.
If you’re taking several boat tours, I also wouldn’t schedule them all on consecutive days unless you truly love long days on the water.
A beach or mainland day between major excursions can make each trip feel more distinct.
How Much Time Do You Actually Spend Exploring?
A Similan day tour isn’t a private expedition.
You’re following a schedule.
Time is divided between:
road transfers,
boat travel,
snorkeling,
island stops,
lunch,
walking,
and getting everybody back onto the boat.
That means some stops may feel perfectly timed while others pass quickly.
If there is something you absolutely want to do — the Island 8 viewpoint, for example — don’t spend half your stop deciding whether to go.
Know your priorities.
This is especially important if you’re filming.
If I want a drone sequence, I already know the shot I’m trying to capture.
If I want walking footage, I record while naturally exploring rather than walking the same route twice.
A little preparation gives you more time to actually enjoy the destination.
The Reality of Crowds
Remote does not mean empty.
The Similan Islands are famous.
When several tour boats arrive around similar times, popular areas can become busy quickly.
Island 8 is the obvious example.
There can be people swimming.
Waiting for boats.
Walking toward the viewpoint.
Taking photographs.
Putting on life jackets.
If you expect a completely deserted island, you’ll probably be disappointed.
If you understand that you’re visiting one of Thailand’s most famous marine national parks, the crowds are easier to accept.
Interestingly, drone footage can make the same place look almost empty.
From above, the landscape becomes dominant.
People shrink into the scenery.
Neither perspective is false.
They’re simply different views of the same place.
Common Mistakes When Visiting the Similan Islands
Booking Without Checking Whether the Park Is Open
The Similans operate seasonally.
Always verify current access before building an itinerary around them.
Underestimating the Boat Journey
This isn’t a nearby Phuket island.
Be mentally prepared for the offshore crossing.
Ignoring Motion Sickness
If you know you’re sensitive to boats, deal with it before leaving the pier.
Bringing Too Much Equipment
Every unnecessary kilogram becomes more annoying as the day progresses.
Waiting All Day for Island 8
Island 8 is spectacular, but don’t mentally skip everything that happens before it.
Spending Every Stop Taking Photographs
Take the photograph.
Then experience the place.
Expecting Specific Wildlife
Turtles, sharks and other marine life aren’t guaranteed to appear on demand.
Assuming the Viewpoint Will Be Empty
It probably won’t be.
Enjoy it anyway.
Forgetting You’re Visiting a Protected Environment
National park rules aren’t optional simply because you’re on vacation.
What I Would Do Differently Next Time
If I returned to the Similans, I wouldn’t completely change the trip.
I would change how I use my time.
Less filming for the sake of filming.
Fewer repeated drone angles.
More time actually in the water.
More attention to smaller islands and transitions between major stops.
The first time you visit somewhere famous, your attention naturally gravitates toward the landmark you’ve already seen online.
The second time, you start noticing everything around it.
And in the Similans, there is a lot around it.
A Realistic Similan Islands Day-Trip Itinerary
Every operator arranges the day slightly differently, so think of this as the general rhythm rather than an exact timetable.
Early Morning – Hotel Pickup
If you’re coming from Phuket, the day may begin when most people on vacation are still asleep.
This is the least glamorous part.
You’re sitting in a van wondering why your holiday suddenly feels like you’re commuting to work.
That feeling disappears later.
Morning – Arrive at the Pier
Check in.
Eat something if provided.
Meet the guides.
Organize snorkeling equipment.
Receive safety instructions.
Then board the boat.
Morning – Offshore Crossing
The mainland gradually disappears.
Open sea takes over.
Then the first islands begin appearing.
This is where the anticipation starts building.
First Island or Snorkeling Stop
Depending on the operator, the first major activity may be snorkeling or time around one of the islands.
This is when the day finally stops feeling like transportation.
Koh Miang – Island 4
Depending on the itinerary, this can include beach time, walking, swimming, lunch or relaxation.
Additional Snorkeling
This is where the marine side of the Similans becomes increasingly important.
Koh Similan – Island 8
The famous part.
Granite formations.
White sand.
The viewpoint.
Swimming.
Walking.
Photography.
This is normally one of the defining stops of the day.
Afternoon – Additional Marine Stop
Depending on your itinerary, another snorkeling or island area may come before the return.
Return Journey
The boat usually becomes much quieter.
Sun.
Swimming.
Heat.
Saltwater.
Walking.
It all catches up with you.
People who were talking constantly during the morning start falling asleep.
The islands slowly get smaller behind you.
Eventually they disappear.
Then the mainland returns.
Should You Plan Anything Important That Evening?
I wouldn’t.
Dinner?
Absolutely.
Nightlife later if you still have energy?
Sure.
But I wouldn’t book something expensive with a strict arrival time shortly after your scheduled return.
Boat trips aren’t trains.
Weather happens.
Traffic happens.
Delays happen.
And after spending an entire day in the sun and sea, you may discover that a shower and your hotel bed suddenly sound much more exciting than whatever you booked.
Give yourself flexibility.
Frequently Asked Questions About the Similan Islands
Where Are the Similan Islands?
The Similan Islands are located in the Andaman Sea off the coast of Phang Nga Province in southern Thailand.
Many visitors travel there from Phuket, but the islands themselves aren’t part of Phuket.
Are the Similan Islands a National Park?
Yes.
The islands and surrounding marine environment are protected within Mu Ko Similan National Park.
That protected status affects access, conservation rules, seasonal opening and what visitors can do in certain areas.
How Many Similan Islands Are There?
The traditional Similan chain is based around nine numbered islands.
The wider national park encompasses additional areas and islands, which is why travelers sometimes encounter different totals while researching.
For understanding the classic Similan itinerary, Islands 1 through 9 are the most useful reference.
Which Is the Famous Similan Island?
Koh Similan, Island No. 8, is the island most people recognize from photographs.
It is famous for its granite boulders, white sand, turquoise bay and elevated viewpoint around Sail Rock.
Can You Visit All Nine Islands?
No.
The numbered islands do not function as nine ordinary tourist stops.
Some are protected.
Some are mainly associated with marine activities.
Others provide the primary visitor beaches and facilities.
The goal isn’t to land on all nine.
It’s to experience selected areas of the archipelago.
Can You Visit Islands 1, 2 and 3?
The southern section of the traditional chain includes important protected areas, and normal tourist access is restricted.
My own tour map clearly identified this section in connection with turtle conservation and no-entry protection.
Not every island needs tourists walking across it.
Is Island 8 Worth Visiting?
Yes.
For most visitors, Island 8 is one of the defining parts of the trip.
Its combination of granite formations, bright water, forest, beach and elevated views is unlike the typical limestone scenery found elsewhere around southern Thailand.
Is Snorkeling Good in the Similan Islands?
Snorkeling is one of the major reasons people visit.
Clear water and the marine environment are fundamental parts of the experience.
Conditions still vary with weather, current, visibility and season, so no individual snorkeling stop is guaranteed to be perfect.
Do You Need to Be a Strong Swimmer?
Not necessarily.
Organized tours normally provide flotation equipment, and beginners can often participate with guidance.
However, being comfortable in open water will make the experience more enjoyable.
If you’re nervous, tell your guide before entering.
Can You See Sea Turtles?
Sea turtles are associated with the wider Similan marine environment and conservation efforts.
That doesn’t mean you’ll automatically see one during your particular tour.
Wildlife encounters should be treated as a bonus.
Are There Sharks?
Sharks inhabit the wider Andaman marine environment.
That doesn’t mean a normal snorkeling tour is guaranteed to encounter one.
Follow the guides and normal marine-safety instructions rather than visiting with either fear or unrealistic expectations.
Can You Visit the Similan Islands Year-Round?
No.
The national park operates seasonally and normally closes during the rougher monsoon period.
Always confirm the current opening status for your specific travel dates.
Can You Visit the Similan Islands From Phuket?
Yes.
Many tour operators arrange pickup from Phuket and transfer passengers north toward the departure area.
Just be prepared for a long day because the land transfer is added to the offshore boat journey.
Is Khao Lak Better Than Phuket for Visiting the Similan Islands?
For the Similan trip specifically, Khao Lak is more convenient geographically because you’re closer to the main departure area.
Phuket remains a completely practical base if that is where you’re already staying.
Are the Similan Islands Crowded?
Popular visitor areas can become busy, particularly when multiple speedboats arrive around similar times.
The islands are geographically remote.
They are not undiscovered.
Are the Similan Islands Good for Children?
They can be excellent for older children who enjoy boats, swimming and snorkeling.
For very young children, consider the length of the day, speedboat conditions and repeated boat transfers before booking.
Is a Private Similan Islands Tour Worth It?
Private options may offer more space and flexibility, particularly for families, groups or serious photographers.
However, because of the distance and national park environment, private Similan trips can become considerably more expensive than private tours around destinations closer to Phuket.
Availability and permitted itineraries can also vary, so check current options directly with reputable operators.
How Much Does a Similan Islands Tour Cost?
Prices vary based on departure point, operator, boat type, group size and what is included.
Rather than relying on an old price from a travel article, compare the total current cost and check whether national park fees, transfers, food, snorkeling equipment and other charges are included.
Should You Book in Advance?
If the Similans are one of the major priorities of your trip, I would.
The islands have a limited operating season, popular operators can fill up, and weather may affect departures.
Booking ahead also gives you time to compare operators instead of simply taking whichever tour has a remaining seat.
What Is the Best Thing to Do in the Similan Islands?
For me, there isn’t one single activity.
The strength of the trip is the combination of:
traveling through the archipelago,
snorkeling,
walking the beaches,
seeing the granite formations,
and eventually reaching Island 8.
Any one of those alone would be enjoyable.
Together they create the experience.
Is Similan Islands Thailand Worth Visiting?
After seeing the Similan Islands for myself, I understand why they’re considered one of the standout marine destinations in Thailand.
But I also think they’re sometimes presented incorrectly.
The Similans aren’t simply one perfect beach.
And they aren’t simply Island 8.
The famous postcard view is only one chapter of the day.
What stayed with me was the progression.
Leaving the mainland behind.
Traveling into open water.
Seeing the first islands appear in the distance.
Passing protected areas where conservation takes priority.
Stepping onto Koh Miang.
Snorkeling in clear offshore water.
Moving farther north.
Watching the granite formations become more dramatic.
And eventually reaching Koh Similan, where the scenery suddenly looks exactly like those photographs that originally made me want to visit.
Except it feels different when you’re actually standing there.
You feel the heat.
Hear the waves.
See boats moving through the bay.
Walk beneath granite boulders that looked tiny from the drone.
Climb higher and watch the beach shrink below you.
Then look outward and realize just how far into the Andaman Sea you’ve traveled.
The trip isn’t perfect.
The speedboat journey is long.
Popular areas can be crowded.
The day starts early.
Weather matters.
And if you hate boats or have no interest in snorkeling, there are easier places to spend your vacation.
But those disadvantages didn’t outweigh the experience for me.
I’ve visited many islands and beaches around Thailand, and the Similans still managed to look different.
That’s increasingly rare.
Would I Go Again?
Yes.
But next time I would approach the day differently.
I would film less.
Choose my drone shots more deliberately.
Spend more time in the water.
And pay even more attention to the islands that don’t appear on postcards.
Because that was the biggest surprise of my first trip.
I thought I was traveling all that way to see Similan Island.
What I discovered was that the real experience was the Similan Islands.
And there is a big difference between the two.
If you come only for the photograph from Island 8, you’ll probably leave with a spectacular photograph.
If you pay attention to everything that happens before and after that photograph, you’ll understand why this remote chain of islands deserves an entire day of your Thailand itinerary.
For me, the Similan Islands became one of those places where, even after the boat turned back toward the mainland, I kept looking behind me.
Because some destinations are beautiful while you’re standing in front of them.
The best ones make you wish the boat wasn’t leaving yet.
For official updates, visa requirements, you can also check the Tourism Authority of Thailand website.
