Dive Sites from Koh Nangyuan – Explore the Best of the Gulf of Thailand
From our private island location on Koh Nangyuan, Duck n Dive offers exclusive access to the finest dive sites in the Gulf of Thailand. Whether you’re a beginner looking for a gentle beach dive at Japanese Gardens, an advanced diver seeking the thrill of Sail Rock’s famous chimney swim-through, or a night diving enthusiast wanting to experience White Rock after dark, we have the perfect dive for you. All our dive sites are accessible via our dedicated dive boat or speedboat, with some – like Japanese Gardens – just steps from our dive center.
Dive sites
Quick Comparison Table
| Dive Site | Depth | Difficulty | Access from Nangyuan | Best For |
|---|---|---|---|---|
| Japanese Gardens | 1–14m | Beginner | Beach dive (1 min) | House reef, macro, Discover Scuba Diving, snorkeling |
| White Rock | 5–22m | Beginner–Intermediate | 10 min by dive boat | Night diving, turtles, barracuda |
| Sail Rock | 5–40m | Intermediate–Advanced | 45 min by speedboat | The Chimney swim-through, whale sharks, pelagics |
| Chumphon Pinnacle | 14–36m | Advanced | 45–60 min by dive boat | Whale sharks, barracuda, drift diving |
| Twins Bay | 3–18m | Beginner | Beach dive (1 min) | Shallow coral, training dives, turtles |
| HTMS Suphairin 313 | 11-27m | Intermediate | 10-15 minutes by dive boat | Wreck diving, artificial reef, naval history |
Japanese Gardens – Our House Reef
Our most accessible dive site. Japanese Gardens is located on the northeast side of Koh Nangyuan, just steps from Duck n Dive dive center. With depths from 1 to 14 meters and calm conditions year-round, this vibrant coral garden is perfect for beginners, Discover Scuba Diving experiences, and macro photography. Clownfish, blue-spotted rays, turtles, and Christmas tree worms are common sightings.
White Rock – Premier Night Dive Site
Koh Tao’s most famous night dive. White Rock is a sprawling reef system featuring massive granite boulders covered in colorful coral, located just 10 minutes from Koh Nangyuan by dive boat. With depths from 5 to 22 meters and mild currents, this site is suitable for Open Water divers and above. Night dives reveal octopus, cuttlefish, and hunting barracuda.
Sail Rock – Thailand's Iconic Pinnacle
The crown jewel of the Gulf of Thailand. Sail Rock (Hin Bai) is an isolated granite pinnacle located between Koh Tao and Koh Phangan, accessible via our speedboat in 60–90 minutes. With depths to 40 meters, the famous chimney swim-through, schools of barracuda, and seasonal whale sharks, this is an essential dive for advanced and adventurous divers.
Chumphon Pinnacle – Advanced Pelagic Diving
One of the best whale shark sites in the Gulf. Chumphon Pinnacle features submerged granite pinnacles rising from 36 meters. This advanced site is known for large pelagic species including whale sharks (seasonal), giant groupers, and schools of chevron barracuda.
Twins Bay – Shallow Training Bay
A sheltered bay perfect for training. Twins Bay is located on the west side of Koh Nangyuan. With depths from 3 to 18 meters and very calm conditions, it’s ideal for confined water training, refresher dives, and easy shore diving.
HTMS Suphairin 313 – Koh Tao's Newest Wreck
A unique wreck diving experience. HTMS Suphairin 313 is a 44.9-meter Royal Thai Navy attack vessel, sunk on September 7, 2023, to create an artificial reef. Located just 15 minutes from Koh Nangyuan on the west side of the island, the wreck rests upright in 27 meters of water with its mast reaching 11 meters. This intact naval vessel offers divers the rare opportunity to explore a large, recently sunk wreck as it transforms into a thriving marine habitat. Barracuda, trevally, groupers, and moray eels are already taking up residence.
Frequently Asked Questions About Dive Sites from Koh Nangyuan
How do I get to dive sites from Koh Nangyuan?
Duck n Dive operates daily dive trips from our center on Koh Nangyuan. For Japanese Gardens and Twins Bay, you simply walk from our dive center into the water – no boat required. For White Rock and other Koh Tao sites, we use our dedicated wooden dive boat (approximately 10–20 minutes travel). For Sail Rock and Chumphon Pinnacle, we use our three-engine speedboat (approximately 20-50 minutes depending on conditions and site).
Can beginners dive at all these sites?
Not all sites are suitable for beginners. Japanese Gardens and Twins Bay are perfect for beginners and Discover Scuba Diving experiences. White Rock is suitable for Open Water certified divers with recent experience. Sail Rock and Chumphon Pinnacle are recommended for Advanced Open Water divers due to depth and potential currents. Your instructor or divemaster will assess your experience level before any dive.
Which dive site is best for seeing whale sharks?
Sail Rock and Chumphon Pinnacle offer the best chance of encountering whale sharks in the Gulf of Thailand, most commonly from March through June. While sightings are never guaranteed, these offshore pinnacles act as cleaning stations and feeding grounds for these gentle giants.
Do I need to book in advance for specific dive sites?
For Japanese Gardens and Twins Bay, you can dive on the day – just speak to our dive center team. For White Rock and other Koh Tao boat dives, we recommend booking a day in advance. For Sail Rock and Chumphon Pinnacle, advance booking is essential as these trips require good conditions and minimum group sizes.
Can I dive multiple sites in one day?
Yes. Our daily boat trips typically include two dives at different sites (e.g., White Rock and another Koh Tao site). For speedboat trips to Sail Rock, we usually do both dives at Sail Rock due to the travel distance, but the site is large enough that you won’t feel repetitive.
Are dive sites weather-dependent?
Yes. While Japanese Gardens and Twins Bay are sheltered and diveable in most conditions, offshore sites like White Rock, Sail Rock, and Chumphon Pinnacle are subject to weather and current conditions. Usually it is possible to dive year round, as at least one side of Koh Tao will be sheltered from any waves. Your safety is our priority – our dive manager will advise on the day which sites are suitable.
Is HTMS Suphairin 313 suitable for beginner divers?
The wreck is best suited for Advanced Open Water or confident Open Water divers due to its depth (11-27 meters) and the need for good buoyancy control around the structure. Exterior exploration is accessible to Open Water divers with recent experience, but penetration requires Wreck Specialty certification. Your Duck n Dive guide will assess your comfort level before the dive.