Sail Rock
Koh Tao · Thailand
Solo limestone pinnacle midway between Koh Tao and Koh Phangan, rising from 40 m to surface. Famous for its vertical chimney swim through from 18 m to 6 m. Reliable whale shark encounters in season.
Conditions
Depth
6 to 40 m
Advanced depths
Current
Can be moderate
Can pick up on the edge
Visibility
15 to 25 m
Clearest in the calm season
Water
27 to 31°C
Tropical wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 27 | 27 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 27 |
| Vis (m) | 15 | 20 | 20 | 20 | 20 | 15 | 15 | 15 | 15 | 10 | 5 | 10 |
| Current | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Moderate | Moderate | Moderate | Moderate | Moderate | Gentle |
Your chances of seeing each animal
Greater Racket-Tailed Drongo
Last confirmed Jun 4, 2026 · 18 records
Very likely
Most dives
Whale shark
Last confirmed May 15, 2026 · 45 records
Very likely
Most dives
Calotes thailandensis
Last confirmed Nov 27, 2025 · 6 records
Very likely
Most dives
Fluted Giant Clam
Last confirmed May 2, 2026 · 21 records
Likely
About 6 in 10 dives
Pink anemonefish
Last confirmed Apr 10, 2025 · 5 records
Likely
About 6 in 10 dives
Bigeye trevally
Last confirmed May 30, 2026 · 4 records
Sometimes
About 1 in 3 dives
Schooling chevron barracuda
Expected
Known here, not yet in recent logs
Gear