Koh Tan Island Guide: Snorkeling, Beaches & Tours from Koh Samui

Is Koh Tan the same as Pig Island?

No.

This is the most important thing to understand before booking.

Koh Tan is not Pig Island.

Pig Island is Koh Madsum, a neighbouring island.

Because the two are visited on the same tour, their names are often grouped together in listings and travel posts. That creates a lot of confusion.

Here is the simplest way to separate them:

For most first-time visitors, the best trip is one that includes both islands.

You do not need to choose between them unless your time is extremely limited.

Why visit Koh Tan?

Koh Tan works because it is easy.

You can leave southern Koh Samui, reach the island area relatively quickly, snorkel over a shallow reef and then continue to Pig Island.

That means less time sitting on a boat and more time actually doing something.

Koh Tan is especially attractive if you:

• want to snorkel but do not want a full-day Koh Tao trip;
• are travelling with children;
• want to combine snorkeling with Pig Island;
• prefer short boat transfers;
• are staying only a few days on Koh Samui;
• want a half-day excursion rather than an all-day tour.

It is not the most ambitious marine adventure from Koh Samui.

That is exactly why many travellers like it.

What is the snorkeling like at Koh Tan?

Snorkeling is the main reason Koh Tan appears on Pig Island itineraries.

Tours typically stop over shallow reef where guests enter the water from the boat.

Depending on conditions, you may see:

• tropical reef fish;
• coral formations;
• sea cucumbers;
• small schools of fish;
• other shallow-water marine life.

The exact visibility and wildlife change from day to day.

Wind, tide, recent rainfall and waves all affect the water.

That means no responsible guide can guarantee crystal-clear visibility or a particular animal sighting on every trip.

Koh Tan’s strength is not guaranteed “world-class” snorkeling.

Its strength is accessible snorkeling close to Koh Samui.

Is Koh Tan good for beginner snorkelers?

Yes, it is one of the more approachable options around Koh Samui for people who are new to snorkeling.

Many tours are designed for ordinary holidaymakers rather than experienced divers.

Basic equipment is commonly provided, including:

• mask;
• snorkel;
• life jacket.

Some trips may also provide fins.

If you are not a confident swimmer, wear the life jacket and tell the crew before entering the water.

You do not need to prove anything by swimming without one.

For first-timers, the biggest challenge is often not swimming ability but getting comfortable breathing through the snorkel.

Take a minute near the boat, relax your breathing and avoid rushing away from the group.

How long do you snorkel at Koh Tan?

It depends on the tour.

Some itineraries give roughly an hour of snorkeling time, while others split the excursion between:

• snorkeling;
• kayaking;
• lunch;
• Koh Madsum;
• beach time;
• transfers.

Do not assume a longer tour automatically means more snorkeling.

A five-hour excursion may include hotel pickup, transfer to the pier, lunch and Pig Island.

If snorkeling is important to you, check the actual itinerary rather than the headline duration.

Look for:

• dedicated Koh Tan snorkeling stop;
• approximate snorkeling time;
• equipment included;
• group size;
• whether the guide enters the water;
• whether kayaking takes up part of the water-activity time.

Can you swim at Koh Tan?

Yes, depending on conditions and where your tour stops.

Many visitors spend most of their Koh Tan time snorkeling rather than simply swimming, but you do not have to be an enthusiastic snorkeler to enjoy the water.

If you prefer to stay near the boat, use a life jacket and float, that is normally fine.

The crew will decide which area is suitable on the day.

Never assume that shallow-looking water means there is no current.

Does Koh Tan have beaches?

Yes, Koh Tan has coastline and beach areas, but the beach is not the main reason most Pig Island tours stop there.

If your priority is a photogenic beach with the famous pigs, Koh Madsum is the more obvious stop.

Koh Tan is generally included because of the reef and snorkeling.

Some longer tours may stop on Koh Tan for lunch or allow additional time ashore.

Others use it primarily as a snorkeling location before moving on.

This is why reading the itinerary matters.

Two tours with “Koh Tan & Pig Island” in the title can structure the day quite differently.

How do you get to Koh Tan from Koh Samui?

There is no ordinary road or bridge connection.

You reach Koh Tan by boat from Koh Samui’s southern coast.

Thong Krut is one of the main departure areas for Koh Tan and Koh Madsum trips.

The boat crossing from southern Koh Samui is short, which is one of the route’s biggest advantages.

Depending on the boat and exact starting point, a speedboat journey can be around 15–20 minutes; a longtail may take longer.

That makes Koh Tan much easier to fit into a short itinerary than destinations requiring a long offshore transfer.

Most travellers either:

• join a shared tour;
• book a private longtail boat;
• take a speedboat excursion;
• join a larger catamaran-style trip.

Do you need to stay in southern Koh Samui?

No.

You can stay in Chaweng, Bophut, Lamai, Maenam or elsewhere and still visit Koh Tan.

Many organised tours include hotel pickup and drop-off.

The road transfer to the south may actually take longer than the boat crossing itself if your hotel is on the northern or northeastern side of Koh Samui.

When comparing tours, check whether hotel transfers are:

• included;
• available only from certain zones;
• subject to an extra fee.

A cheaper boat ticket is not necessarily cheaper overall if you need to arrange your own taxi to the pier.

Longtail boat or speedboat to Koh Tan?

Both are good options.

Because Koh Tan is close to Koh Samui, speed is less important than it would be on a much longer route.

Longtail boat

A traditional Thai longtail is ideal if you want:

• a more local-feeling experience;
• a small private charter;
• a relaxed pace;
• an atmospheric boat ride;
• flexibility for a family or small group.

Longtails are open and can feel noisy and bumpy when the sea is choppy.

Speedboat

A speedboat is a good choice if you want:

• quicker transfers;
• an organised shared tour;
• a more structured itinerary;
• less time between stops.

Speedboats often carry larger groups than private longtails.

Catamaran

The Koh Tan and Pig Island catamaran listing is a format alternative. Our September 2026 inventory has no review count for it, so it is not our featured recommendation; check its current itinerary and reviews.

Some excursions use larger catamaran-style boats.

These can suit travellers who prefer more deck space or want a tour that combines snorkeling with kayaking, lunch or a more leisurely cruise format.

There is no single “best” boat.

Choose based on group size, comfort, itinerary and price.

Private Koh Tan tour or shared tour?

The private longtail to Koh Tan and Pig Island is one option for your own boat; hotel transport and entry fees need checking.

Shared tour

Shared trips are usually best value for:

• solo travellers;
• couples;
• small families.

A typical package may include:

• hotel transfers;
• boat;
• guide;
• snorkeling equipment;
• life jacket;
• lunch or snacks;
• Koh Tan snorkeling;
• Koh Madsum.

The trade-off is that you follow the group’s timetable.

Private tour

A private longtail or speedboat makes more sense if:

• you are travelling with several people;
• you want a flexible departure;
• you prefer a slower pace;
• you want more control over the snorkeling stop;
• you want to leave Pig Island earlier or stay longer.

For families and groups, the cost per person can become surprisingly competitive once the charter price is split.

Private does not mean Koh Tan or Pig Island will be empty.

It means the boat and timetable are yours.

Koh Tan + Pig Island: what does the combined tour look like?

The exact order changes, but a common trip works like this:

1. Hotel pickup

A minivan or private vehicle collects you from your accommodation.

2. Transfer south

You travel to the departure point around southern Koh Samui.

3. Boat to Koh Tan

The group boards a longtail boat, speedboat or catamaran.

4. Snorkeling

The boat stops around Koh Tan’s reef.

5. Continue to Koh Madsum

The journey between the two islands is short.

6. Pig Island

You go ashore, see the pigs, relax on the beach and swim.

7. Lunch

Depending on the tour, lunch may be served on an island or back on Koh Samui.

8. Return

The boat heads back to the southern coast and transfers take you to your hotel.

The overall experience is much more varied than a snorkeling-only trip.

Is Koh Tan worth visiting without Pig Island?

Yes, but for most first-time visitors, there is little reason to skip Koh Madsum if the itinerary can include both.

The islands are close together and offer complementary experiences.

Koh Tan gives you the reef.

Koh Madsum gives you the beach and pigs.

A standalone Koh Tan trip makes more sense if:

• you have already visited Pig Island;
• you care much more about snorkeling;
• you have booked a private boat;
• you want a slower, less structured day;
• your accommodation offers a direct Koh Tan excursion.

Otherwise, the combined tour is usually the better use of your time.

Koh Tan vs Koh Madsum

This is not really an either/or choice.

Still, the comparison is useful.

If you have time for only one and your priority is snorkeling, choose Koh Tan.

If your main goal is the famous Pig Island experience, choose Koh Madsum.

Most travellers should simply book both.

Koh Tan vs Koh Tao

Compare a Koh Tao and Koh Nang Yuan day trip departing Samui if you want the longer snorkeling route.

The names are similar, but the experiences are very different.

Koh Tan

Choose Koh Tan if you want:

• short boat transfer;
• half-day excursion;
• Pig Island combination;
• beginner-friendly snorkeling;
• easy family outing.

Koh Tao

Choose Koh Tao if you want:

• a full-day marine excursion;
• snorkeling or diving to be the main focus;
• more time offshore;
• a more dedicated underwater experience.

Koh Tao is much better known as a diving destination.

Koh Tan is much easier.

For a three- or four-day Koh Samui itinerary, Koh Tan may be the more practical choice.

Koh Tan vs Ang Thong Marine Park

This Ang Thong speedboat itinerary from Samui lists snorkeling, kayaking and island viewpoints. Check park access and fees separately.

Ang Thong Marine Park is a bigger, more dramatic excursion.

It is known for:

• limestone islands;
• viewpoints;
• lagoons;
• kayaking;
• full-day cruising.

Koh Tan is more compact and convenient.

Choose Koh Tan if you want a short snorkeling-and-Pig-Island day.

Choose Ang Thong if you want a full-day scenic adventure.

They are different enough that travellers staying a week on Koh Samui can easily do both.

Best time to visit Koh Tan

The most reliable dry-season period around Koh Samui is generally late January through April.

February and March are particularly attractive for boat trips.

But Koh Samui does not follow exactly the same monsoon pattern as Phuket.

That means:

• May can still be good;
• June can be good;
• July can be good;
• August can be good;
• September remains workable;
• October becomes more unsettled;
• November is typically the wettest and least reliable month;
• December is mixed and often improves later.

For snorkeling, the conditions on the actual day matter more than the month alone.

Wind and waves can reduce visibility even when it is sunny.

For more detail, see our best time to visit Pig Island and Koh Tan.

What should you bring?

For a normal Koh Tan + Pig Island excursion, bring:

• swimwear;
• towel;
• sunscreen;
• rash vest;
• hat;
• sunglasses;
• waterproof phone pouch;
• dry bag;
• water;
• some cash;
• change of clothes.

Most organised tours provide basic snorkeling equipment.

Check before departure if you need:

• prescription mask;
• children’s snorkeling gear;
• fins;
• specialist equipment.

If you have your own mask and know it fits, bring it.

A comfortable mask can make a big difference.

What should you wear?

Keep it simple.

Wear swimwear under light clothes and choose footwear that can get wet.

Depending on the boat and tide, you may need to step through shallow water when boarding or landing.

A rash vest is one of the most useful things you can pack because it gives you extra sun protection while snorkeling.

The sun can feel much stronger on the water than it does around your hotel pool.

Is Koh Tan suitable for families?

Generally, yes.

The short crossing is a major advantage.

Families do not have to spend hours travelling before reaching the activity.

The combination with Pig Island also gives children something memorable even if they are not interested in snorkeling.

Before booking, check:

• minimum age;
• life jacket sizes;
• amount of shade;
• boat type;
• toilet availability;
• transfer time from your hotel;
• lunch arrangements.

Families with toddlers may prefer a private boat or a larger vessel over a packed group speedboat.

Is Koh Tan suitable for non-swimmers?

You can still enjoy the excursion if you do not snorkel.

You can remain on the boat during the reef stop and then join the Pig Island visit.

Some less confident swimmers may be comfortable entering the water with a life jacket.

But if you cannot swim, tell the crew.

Do not enter open water simply because other passengers are doing it.

The captain and guide are the people best placed to judge local conditions.

How crowded is Koh Tan?

Koh Tan is generally less famous than Pig Island, but the snorkeling areas can still receive several tour boats.

Crowds depend on:

• season;
• departure time;
• weather;
• tour schedules;
• school holidays.

A private boat gives you more flexibility, but it does not guarantee an empty reef.

The biggest crowd concentration on the combined route often occurs at Koh Madsum because visitors gather around the same Pig Island beach area.

Koh Tan tends to feel more activity-focused.

Does Koh Tan have the swimming pigs?

No.

The famous pigs are on Koh Madsum.

Some combined tours are marketed so heavily around Pig Island that travellers assume the pigs move between the two islands.

They do not.

Your Koh Tan stop is primarily for snorkeling.

Your Koh Madsum stop is where you meet the pigs.

Can you visit Koh Tan independently?

In practical terms, most visitors arrange a boat through a tour operator, accommodation provider or private charter.

There is no ordinary passenger ferry service that works like a scheduled commuter route.

If you want maximum independence, a private longtail boat is usually the closest equivalent.

It gives you the boat without forcing you into a larger tour group.

Make sure you understand exactly what the charter includes:

• boat only;
• snorkeling equipment;
• guide;
• hotel transfer;
• lunch;
• island fees;
• drinks.

A low charter price may exclude several extras.

How much time do you need?

For a first visit, a half-day is enough for the classic combination.

You do not need an entire day simply to snorkel at Koh Tan and see Pig Island.

A longer trip becomes worthwhile if it adds something meaningful, such as:

• kayaking;
• longer snorkeling time;
• lunch;
• sunset;
• additional island stops;
• a very relaxed private itinerary.

Avoid paying for extra hours just because “full day” sounds more complete.

The compact nature of this route is part of its appeal.

How to choose a Koh Tan tour

When comparing tours, check these questions in order.

1. Does it include Koh Madsum?

Most first-time visitors will want both islands.

2. How long is the snorkeling stop?

This matters if Koh Tan is your main reason for booking.

3. What boat does it use?

Longtail, speedboat and catamaran trips feel different.

4. Is snorkeling equipment included?

Usually yes, but confirm it.

5. Are hotel transfers included?

Important if you are staying far from southern Koh Samui.

6. Is lunch included?

Do not assume.

7. Are island fees included?

Some listings exclude local entrance or maintenance fees.

8. Is the tour private or shared?

A “small boat” does not necessarily mean private.

9. What is the cancellation policy?

Especially important during wetter months.

Is Koh Tan worth it?

For most travellers considering a Pig Island trip, yes.

Koh Tan makes the excursion more complete.

Without Koh Tan, Pig Island is mainly a quirky beach visit.

With Koh Tan, you add snorkeling and turn the trip into a proper two-island experience.

It is especially worthwhile for:

• first-time Koh Samui visitors;
• families;
• couples;
• beginner snorkelers;
• travellers who want a half-day excursion;
• people who dislike long boat transfers.

Skip it only if snorkeling has no appeal to you at all or you are already planning a more intensive marine day elsewhere.

Frequently asked questions

What is Koh Tan famous for?

Koh Tan is best known among Koh Samui visitors for shallow-water snorkeling and its coral reef.

Is Koh Tan Pig Island?

No. Koh Tan is the snorkeling island. Koh Madsum is Pig Island.

How far is Koh Tan from Koh Samui?

Koh Tan lies only a few kilometres off Koh Samui’s southern coast, and the boat trip from the south is typically around 15–20 minutes depending on the vessel and conditions.

How do you get to Koh Tan?

Most visitors take an organised tour or private boat from southern Koh Samui, commonly from the Thong Krut area.

Can you snorkel at Koh Tan?

Yes. Snorkeling is the main reason many tours stop there.

Do you need to be an experienced swimmer?

No, but you should tell the crew if you are not confident in open water. Life jackets are commonly provided.

Can children visit Koh Tan?

Yes, many family-oriented tours visit Koh Tan and Pig Island. Check age restrictions and children’s life-jacket availability with the specific operator.

Is Koh Tan better than Pig Island?

They are different. Koh Tan is better for snorkeling; Pig Island is better for the pigs and beach experience. Most visitors should combine them.

Can you visit Koh Tan and Pig Island in one day?

Yes. In fact, this is the standard format for many tours from Koh Samui.

Is Koh Tan a full-day trip?

It can be, but many Koh Tan + Pig Island itineraries fit comfortably into a half-day or roughly 5–6 hours including other activities and transfers.

Is Koh Tan good in July and August?

Yes, tours can operate throughout these months. Koh Samui’s wettest period normally comes later in the year, although daily sea conditions always matter.

What is the worst month for a Koh Tan boat trip?

November is usually the least predictable because it is typically Koh Samui’s wettest month.

Choosing your trip

Koh Tan is not the island that gets all the Instagram attention.

That honour goes to neighbouring Pig Island.

But for many travellers, Koh Tan is what turns the Pig Island excursion into a genuinely worthwhile boat day.

The reef gives you something active to do. The short crossing keeps the trip easy. And because Koh Madsum is so close, there is little reason to choose between snorkeling and the pigs.

For a first visit, the simplest formula is still the best:

snorkel at Koh Tan + beach time on Koh Madsum + return to Koh Samui in half a day.

Compare our current Koh Tan and Pig Island tours from Koh Samui to find shared, private, longtail and speedboat options.

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