What Are The Best Dive Sites in Koh Tao

Do you know that Koh Tao features over 25 to 40 diverse dive sites?

For you, choosing where to do scuba diving in Koh Tao, Thailand, for the  first time might feel overwhelming because each site claims to be the best. 

You might be unsure: Which sites are actually right for me? 

While there are scuba diving school at Koh Tao which can help you choose the location as per your experience level. But, it is also important you have a clear knowledge of which sites are perfect for beginners, intermediate, and advanced. This will help you make more confident and informed choices.

This guide also aims to give a clear breakdown of the best dive sites in Koh Tao. By the end, you will feel confident knowing where to dive, why it matters, and what to expect underwater. 

Now, let’s dive into the seven dive sites in Koh Tao. 

1. Sail Rock (Hin Bai)

This site is well known for its dramatic pinnacle that rises out of the open sea and the sheer amount of marine life. 

It is located between Koh Tao and Koh Phangan in the Gulf of Thailand. It is also known as one of the most exciting dive sites in the area. Sail Rock is ideal for divers who have completed a Koh Tao diving course and want to practice:

• Bouyancy

• Navigation

• Great skills in shallower plateaus

This site is not ideal for absolute first-time divers due to variable currents and depths. 

Depth & Conditions

• Typical depth: 5-25 meters 

• Maximum depth: 40 meters on the sandy bottom

• Current: Mild to strong (variable by side and day)

• Visibility: Usually – meters

• Water conditions: 10-25 meters (up to 40m in good conditions)

Marine Life 

• Schools of barracuda 

• Trevally 

• Batfish

• Fusiliers

• Plus Groupers 

• Moray eels

• Scorpionfish 

• Colourful reef fish like angelfish

• Whale sharks appear seasonally (March-May, Sep-Oct) during plankton blooms

Best For

Advanced open water divers, photographers capturing pelagic action, and trainees honing skills in currents or swim-throughs.

2. Chumphone Pinnacle 

Chumphon Pinnacle is a double pinnacle dive site near Koh Phangan in Thailand's Gulf of Thailand. This site is often used for divers who have recently completed their Open Water certification and are ready to build confidence. 

The shallow plateau areas are around 8-15 meters. This area is perfect for practising basic skills while enjoying colourful reefs and marine life. That said, it is usually avoided for absolute beginners on days when conditions are not ideal. 

Depth & Conditions 

• Typical depth: 8-20 meters

• Maximum depth: 30 meters

• Current: Mild (usually), can be strong on leeward sides

• Visibility: Usually 10-20 meters

• Water conditions: Calm, occasional chop in wind

Marine Life 

• Schools of jacks, snappers, and fusiliers

• Groupers, angelfish, parrotfish, nudibranchs

• Occasional whale sharks, eagle rays in blue

Best For 

Open water divers building confidence, macro enthusiasts, and light current training.

3. Southwest Pinnacle 

Southwest Pinnacle is a tight cluster of submerged granite pinnacles sitting southwest of Koh Tao in the Gulf of Thailand. It is a super fun, multi-level dive where you can start shallow and gradually work your way deeper. It is a special highlight of Koh Tao island diving for intermediate divers. 

Depth & Conditions

• Typical depth: 18-25 meters

• Maximum depth: 30-40 meters

• Current: Mild to moderate (strong possible)

• Visibility: Usually 10-20 meters (3-40m variable)

• Water conditions: Calm to choppy, exposed site

Marine Life 

• Barracuda (chevron, yellowtail), trevally, fusiliers, batfish

• Groupers, morays, stingrays, scorpionfish, macro shrimp

• Seasonal whale sharks, eagle rays

Best For

Advanced open water divers, Nitrox users extending bottom time, and pelagic/macro seekers exploring swim-throughs.

4. Shark Island

This site is a small rocky islet off Koh Tao's southeast coast in Thailand's Gulf. The dive itself is gorgeous with vibrant corals on boulders. However, this site is suitable for advanced divers already experienced in scuba diving conditions in Koh Tao, Thailand. 

Depth & Conditions

• Typical depth: 14-25 meters

• Maximum depth: 28-36 meters

• Current: Strong (exposed site, drift possible)

• Visibility: 5-30 meters (variable)

• Water conditions: Can be choppy

Marine Life 

• Soft tree corals, gorgonians, whip corals, barrel sponges

• Barracuda, batfish, butterflyfish, turtles, leopard sharks, rays

• Seasonal whale sharks

Best For

Advanced divers, photographers, and drift enthusiasts exploring swim-throughs. 

5. White Rock 

White Rock (Hin Kao) sits just off the west coast of Koh Tao in the Gulf of Thailand. It is a favourite for a reason. The shallow northern pinnacle generally has calm conditions, and colourful coral gardens make it feel relaxed and welcoming. 

Depth & Conditions

• Typical depth: 12-18 meters (average 12-15m)

• Maximum depth: 22 meters

• Current: None to mild (calm most of the year)

• Visibility: Usually 10-20 meters

• Water conditions: Flat, protected

Marine Life

• Staghorn coral gardens, sea whips, schools of fusiliers, parrotfish

• Angelfish, butterflyfish, groupers, titan triggerfish, and occasional turtles

• Night: Octopus, Spanish dancers, glowing critters

Best For

Beginners, all-level training, night divers, and photographers capturing reefs.

6. HTMS Sattakut Wreck 

HTMS Sattakut Wreck is a 49m-long former Thai Navy transport ship that was intentionally sunk in 2011 off the west coast of Koh Tao to create an artificial reef. It is an awesome dive, but definitely one for advanced divers. 

Depth & Conditions

• Typical depth: 18-30 meters

• Maximum depth: 32 meters (stern)

• Current: None to strong

• Visibility: Usually 5-20 meters (variable, often poor)

• Water conditions: Calm to wavy

Marine Life

• Groupers, snappers, barracuda, trevally, moray eels

• Wrasse, rays under hull, barrel sponges

• Rapid coral growth attracts reef fish

Best For

Wreck enthusiasts, deep divers, photographers with torches exploring interiors.

7. Green Rock 

Green Rock is a vibrant seamount rising up from deeper water off the north coast of Koh Tao in the Gulf of Thailand. The site is made up of multi-level pinnacles, which makes it a fun playground for intermediate divers who want a bit of variety. 

Depth & Conditions

• Typical depth: 12-22 meters

• Maximum depth: 30 meters

• Current: Mild to strong (drift dives common)

• Visibility: Usually 10-25 meters

• Water conditions: Calm to choppy, exposed

Marine Life

• Fusiliers, parrotfish, angelfish, titan triggerfish schools

• Groupers, morays, schooling barracuda, and occasional turtles

• Gorgonians, sea fans hosting nudibranchs

Best For

Intermediate divers, current practice, reef explorers on multi-level terrain.

The Bottom Line 

Now, you are ready with the top dive sites in Koh Tao, Thailand. 

The next step is to choose a reputable diving course provider in Koh Tao. A good dive school will assess your experience level, explain site conditions clearly, and choose locations that match your comfort and skills on the day of diving.

Many dive schools on the island offer beginner courses, try dives, and guided fun dives, but standards can vary.

As an example, La Bombona Diving is one of the several dive schools on the island that offers structured scuba diving courses and guided dives for beginners and certified divers. 

At last, the only thing that matters is that your time underwater in Koh Tao is calm, memorable, and rewarding. 

Frequently Asked Questions (FAQs)

1. Is scuba diving in Koh Tao worth it?

Yes, it is worth it. It is one of the most affordable and best places in the world to get certified.

2. Is it better to dive in Koh Tao or Koh Samui?

Koh Tao is generally better than Koh Samui due to a large number of dive sites, superior marine life, and lower costs.

3. What are the best diving months in Koh Tao? 

The best time for diving in Koh Tao is from March to September, offering: 

• The clearest water

• Warmest temperatures

• Best visibility 

If you want to spot whale sharks, the peak months are March to April and September to October.

4. When not to go to Koh Tao?

The worst time to visit Koh Tao is generally from late October to early December, which is the peak of the monsoon season.

5. How many days do you need to dive in Koh Tao?

You typically need 3 to 4 days for a comprehensive diving experience in Koh Tao, covering either the Open Water Certification course (2.5–4 days) or several days of fun dives.

6. Do I need a dive school to choose the right dive sites in Koh Tao? 

Yes, first-time divers benefit from working with established dive schools like La Bombona Diving. They assess conditions daily and match dive sites to your experience level.