Sail Rock
Koh Samui & Ang Thong · Thailand
Isolated granite pinnacle rising 15m above the surface and 40m below, featuring a dramatic vertical chimney swim-through. Renowned for massive schools of chevron barracuda, abundant pelagic fish, and frequent whale shark encounters. Strong currents and thermoclines common below 25m.
Conditions
Depth
5 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 30°C
Rash guard
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 27 | 27 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 27 | 27 |
| Vis (m) | 15 | 15 | 20 | 20 | 20 | 15 | 15 | 15 | 15 | 10 | 10 | 10 |
| Current | Gentle | Gentle | Gentle | Gentle | Gentle | Moderate | Moderate | Moderate | Moderate | Moderate | Strong | Moderate |
Your chances of seeing each animal
Bigeye trevally
Last confirmed May 30, 2026 · 8 records
Very likely
Most dives
Chevron barracuda
Last confirmed Jan 7, 2026 · 2 records
Likely
About 6 in 10 dives
Whale shark
Last confirmed Jan 26, 2026 · 2 records
Sometimes
About 1 in 3 dives
Giant grouper
Expected
Known here, not yet in recent logs
Moray eel
Expected
Known here, not yet in recent logs
Batfish
Expected
Known here, not yet in recent logs
Gear