Dive Site: Koh Tao — White Rock

About Koh Tao — White Rock

White Rock, also known as Hin Kao, is one of Koh Tao's most expansive and frequented dive sites, located just 2 kilometers off the island's west coast. Its name derives from a shallow white rock formation visible near the surface, acting as a navigational marker. This site is celebrated for its rich biodiversity and serves as an excellent location for divers of all experience levels, from introductory dives to advanced explorations. The underwater topography consists of two significant granite pinnacles and numerous boulders, which are extensively covered in both hard and soft corals. A notable feature is a beautiful, dense coral garden situated between the two main pinnacles, along with sandy patches and a small hidden cave, creating a varied and intriguing landscape. Depths range from a shallow 1 meter to a maximum of 22-26 meters, with an average depth around 12 meters, making it accessible for Open Water certified divers. Marine life at White Rock is abundant and diverse, offering sightings of blue-spotted ribbontail rays, green sea turtles, and various moray eels. Schools of yellowtail barracuda are a common sight, alongside numerous reef fish such as angelfish, bannerfish, and butterflyfish. Seasonal whale shark sightings also occur, adding to the excitement. The site is particularly active at night, with giant barracuda, cuttlefish, and pufferfish emerging, making it Koh Tao's most celebrated night diving location. White Rock boasts generally calm conditions with mild to no current for much of the year, and visibility typically ranges from 10 to 20 meters, occasionally reaching up to 30 meters. Its sheltered position on the west coast ensures accessibility in almost all weather, providing a reliable and rewarding diving experience for underwater photography, navigation training, and simply enjoying the vibrant underwater world.

Dive site facts: Koh Tao — White Rock

Depth

1–26 m

Typical dive

12–22 m, 50–60 min

Current

Mild to none

Visibility

10–20 m, up to 30 m

Water temperature

27–30°C

Entry

Boat

Level

All levels (Open Water Diver minimum)

Dive type

Reef, pinnacle, night, macro, coral garden

Night dive

Possible

Region / port

Koh Tao, Thailand

Coordinates

10.095, 99.835

Conditions & Currents

White Rock generally experiences mild to negligible currents throughout most of the year, making it an excellent site for divers of all levels, including beginners. Its sheltered location on the west coast provides protection from strong weather, ensuring relatively calm conditions for nearly all dives. Visibility typically ranges from 10 to 20 meters, though it can extend up to 30 meters during optimal periods, particularly from July to September. During the northeast monsoon from November to December, runoff from heavy rainfall can temporarily reduce visibility. Water temperatures remain consistently warm, between 27-30°C, meaning thermoclines are rarely a concern. Entry is typically by boat, with clear navigation along a north-south axis making the dive straightforward.

Marine life & sighting chances

Blue-spotted Ribbontail Ray

common

Green Sea Turtle

common

White-eyed Moray Eel

common

Yellowtail Barracuda

common

Titan Triggerfish

Breeding season · common

Banded Sea Krait

occasional

Blue-ringed Angelfish

common

Six-banded Angelfish

common

Bannerfish

common

Beaked Coralfish

common

Butterflyfish

common

Whale Shark

March-May, June-September · occasional

Polka-dot Nudibranch

occasional

Malabar Grouper

occasional

Dive profile & how the dive runs

Dives at White Rock typically begin at the southern pinnacle, which descends to a maximum depth of 22 meters. From there, you explore the main rock formations, looking into crevices for moray eels and under ledges for blue-spotted ribbontail rays. A large school of yellowtail barracuda often congregates around the southern buoy line. As you gradually ascend and move northward, you'll encounter a vibrant coral garden situated between the two main pinnacles, at an average depth of 9-12 meters. This area is rich with reef fish and often features a small, accessible hidden cave. The dive progresses along the north-south axis, allowing for a gradual ascent towards the shallower northern end, where the surface-breaking white rock can be seen. Safety stops are comfortably conducted in the shallow coral garden or along the rock formations at around 5 meters.

Underwater photography

White Rock offers excellent opportunities for both wide-angle and macro photography. For wide-angle shots, capture the expansive coral gardens, the impressive granite pinnacles, and schooling barracuda. The clear visibility, often reaching 10-20 meters, is ideal for showing the scale of the site. For macro enthusiasts, bring a suitable lens to focus on the numerous nudibranchs, cleaner shrimps, and moray eels found in crevices and under ledges. Night dives provide a unique photographic challenge and reward; use a strong focus light and consider strobes to bring out the vibrant true colors of corals and nocturnal creatures, which appear muted in natural light at depth. Buoyancy control is paramount to avoid disturbing the delicate corals and to capture sharp images in the mild currents.

Combine with nearby dive sites

• Koh Tao — Japanese Garden

  Japanese Garden is Koh Tao's premier shallow reef dive site, located in a sheltered bay on the eastern side of Koh Nang Yuan island.

• Koh Tao — Twins

  Often paired with White Rock for a varied day of diving.

• Koh Tao — Green Rock

  Green Rock, situated off the west coast of Koh Tao near Koh Nang Yuan, is a unique dive site characterized by a striking cluster of granite…

• HTMS Sattakut Wreck

  The HTMS Sattakut Wreck is a 48-meter long, decommissioned U.S.

• Chumphon Pinnacle

  Chumphon Pinnacle is a renowned deep dive site situated approximately 12 kilometers northwest of Koh Tao in the Gulf of Thailand.

• Sail Rock

  A longer trip, but popular with Koh Tao dive centers.

Getting there & logistics

Koh Tao is part of the Chumphon Archipelago in the Gulf of Thailand, accessible via ferries from Chumphon, Surat Thani, Koh Samui, and Koh Phangan. The main gateway is Mae Haad Pier. High-speed catamarans like Lomprayah offer quick transfers, for example, under an hour from Koh Samui. Longer six-hour sleeper ferries are available from Chumphon. Dive trips to White Rock typically depart from Mae Haad and involve short boat rides, usually around 20 minutes, making it a very accessible site. Day trips from Koh Tao usually include two dives, and White Rock is frequently combined with other nearby sites like Twins or Japanese Garden to offer a diverse itinerary. No specific permits are mentioned for diving at White Rock itself.

Safety & environment

While White Rock is known for its calm conditions, diver safety remains paramount. The nearest recompression chamber is located in Koh Samui, necessitating boat transfers in case of an emergency, which can take several hours depending on sea conditions and ferry schedules. Therefore, comprehensive dive insurance covering medical emergencies and evacuation is strongly advised for all divers. Site-specific hazards include encountering territorial titan triggerfish during their breeding season, though they become docile at night. Always maintain excellent buoyancy control to avoid contact with the fragile coral and marine life. Follow your dive guide's instructions, especially regarding the hidden cave, and never touch marine creatures. Night diving requires extra attention to your torch, buddy, and navigation, though the site's straightforward layout aids orientation.

Who it suits — and who it doesn't

FAQ

Koh Tao — White Rock FAQ

Liveaboards diving Koh Tao — White Rock

These liveaboards may visit Koh Tao — White Rock on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Mandarin Queen 9

Thailand

26 guests37.5 m

Manta Queen 8

Thailand

24 guests

$127/day

The Junk

Thailand

18 guests33 m

$163/day

Deep Andaman Queen

Thailand

23 guests30.5 m

$194/day

Explorer

Thailand

16 guests25 m

$150/day

Andaman

Thailand

20 guests26 m

$108/day

Stingray

Thailand

8 guests24 m

$245/day

Seatopia

Thailand

24 guests24 m