Koh Tao (Thailand) is a diver’s paradise, a small island in the Gulf of Thailand, located about 70 km north of Koh Samui and 195 km south of Bangkok. Its clear waters meet colorful coral reefs and an endless variety of marine life. Beneath the surface, the island reveals a world full of wonder, from calm shallow areas to dramatic underwater cliffs.
Beyond its beauty, Koh Tao offers something for every diver. Beginners can explore gentle reefs, while experienced divers can venture into more challenging sites. Each dive brings new surprises and unforgettable moments.
So, let’s make your Kao Tao diving experience more special with these 6 locations that showcase the very best of Kao Tao’s underwater world.
1. Chumphon Pinnacle
Chumphon Pinnacle is a deep rock formation rising from the sea floor in open water. The dive offers amazing visibility, sometimes up to 30 metres. It’s famous for seeing schools of trevally, snapper, and even whale sharks during March–April and September–October. This dive is perfect for those who enjoy deeper waters and encounters with large fish.
| Level: Advanced
Highlight: Spot whale sharks and large schools of fish
Depth: Approximately 14 meters (46 feet) to a maximum of 40 to 45 meters (131 to 148 feet)
Tip: Currents can be strong, so it’s best for experienced divers |
2. Sail Rock
Sail Rock rises 8 metres above the water with walls dropping deep beneath. Known worldwide, Sail Rock diving in Thailand offers an unforgettable drift dive experience. Divers can enjoy colourful coral, schools of reef fish, and larger pelagic species. The vertical swim-through, often highlighted in sail rock scuba diving guides, adds adventure and makes it one of the top dives in the Gulf of Thailand.
| Level: Intermediate–Advanced
Highlight: Vertical swim-through called “The Chimney” and colourful coral Depth: 540 meters (131 feet) Tip: Morning dives provide calmer currents and best visibility |
3. Shark Island![Shark Island]()
Shark Island is a twin rock formation southeast of Koh Tao. Each side has its own unique features and marine life. You can spot schools of snapper, trevally, and sometimes reef sharks. This dive is exciting because it offers two very different experiences in one dive.
| Level: Intermediate
Highlight: Twin rocks, each side home to different marine life Depth: 5-10 meters near the surface, 28-35 meters deeper down Tip: Check out both sides for varied sea life |
4. White Rock
White Rock is the largest of three rocky sites near the island. Shallow areas are ideal for beginners, while the deeper sections offer more exploration. This site is great for spotting small, colourful reef fish and trying night dives to see creatures that hide during the day.
| Level: Beginner–Intermediate
Highlight: Night dives and small reef creatures like shrimp and triggerfish Depth: Approximately 5 meters (16 feet) to a maximum of 22 meters (72 feet) Tip: Calm waters make it perfect for underwater photography |
5. Green Rock
Green Rock is an exciting site with caves and swim-throughs. Moray eels, groupers, and other colourful fish hide in the rock formations. Divers who love exploring nooks and crannies will enjoy the adventure and spotting creatures that are often missed on more open dives.
| Level: Intermediate
Highlight: Gaps in the rock formations, caves, and crevices are full of marine life |
6. Twin Peaks
Twin Peaks features two large pinnacles near Koh Nang Yuan. Its shallow depth makes it beginner-friendly. There is easy navigation, which allows beginners to focus on enjoying marine life without worrying about currents.
| Level: Beginner
Highlight: Two close pinnacles with easy navigation Depth: Approximately 5-6 meters on its eastern side to around 18-22 meters on its western side at the deepest pinnacle Tip: Pair this dive with a surface break at nearby beaches. |
Extra Sites To Explore
- Hin Wong Pinnacle: A good site for spotting granite boulders with seafans and whip corals, along with coral groupers and shrimpfish.
- Mango Bay: Great for beginners and snorkelers with shallow waters (2–15 meters).
- Japanese Gardens: Located near Koh Nang Yuan, these gardens are excellent for shallow diving and snorkeling.
Here it is!! These are the top sites that will make your Koh Tao journey full of colorful reefs and unique marine life. So, step out and experience this wonderful journey today!
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