Green Rock
Green Rock sits just north of Koh Tao and is usually dived as part of trips to nearby sites like Nang Yuan Island. It consists of a cluster of submerged granite boulders forming a maze-like underwater landscape.
Depth & Conditions
- Depth range: ~8 to 30 meters
- Visibility: Typically 10–25 meters
- Currents: Can be mild to quite strong at times (this is what makes it exciting but sometimes challenging)
Topography
The site is famous for its tight swim-throughs, tunnels, and narrow gullies between massive rocks. Some passages are small and require good buoyancy control—this isn’t the best place for brand-new divers, but it’s great for those with a bit of experience.
Marine Life
Green Rock is particularly known for:
- Moray eels (often seen poking out of crevices)
- Blue-spotted stingrays
- Reef fish like angelfish, butterflyfish, and barracuda
- Occasional sightings of whale sharks (rare, but possible around Koh Tao)
There’s also plenty of macro life hidden among the rocks, so it appeals to both wide-angle and macro enthusiasts.
Dive Experience
- Best suited for: Open Water divers with some experience, Advanced divers preferred when currents are strong
- Highlight: Exploring the labyrinth of rock formations and spotting hidden marine life
- Caution: Watch for surge and current, especially near tighter passages
Location
10.124553, 99.810766; Get Directions
