An Thoi Islands
Phu Quoc · Vietnam
The An Thoi archipelago clusters of small islands off Phu Quoc's southern tip offer the best diving in the Gulf of Thailand — calm, clear water over gardens of staghorn and brain coral populated by dense reef fish communities and resident sea turtles. Depths rarely exceed 20 meters, making the area ideal for newer divers while the macro diversity satisfies experienced underwater photographers. Nudibranchs, blue-ringed octopus, and frogfish all occur regularly across the sandy channels between the islands.
Conditions
Depth
5 to 20 m
Open water and up
Current
Often strong
Can pick up on the edge
Visibility
5 to 10 m
Clearest in the calm season
Water
27 to 31°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 27 | 27 | 28 | 28 | 29 | 28 | 27 | 27 | 27 | 27 | 27 | 27 |
| Vis (m) | 10 | 15 | 15 | 15 | 10 | 5 | 5 | 5 | 5 | 5 | 10 | 10 |
| Current | Gentle | Gentle | Still | Still | Gentle | Moderate | Strong | Strong | Strong | Moderate | Gentle | Gentle |
Your chances of seeing each animal
African Giant Snail
Last confirmed Dec 31, 2025 · 9 records
Likely
About 6 in 10 dives
Common Myna
Last confirmed Apr 29, 2026 · 11 records
Likely
About 6 in 10 dives
Spotted Forest Skink
Last confirmed Mar 5, 2026 · 13 records
Likely
About 6 in 10 dives
Common Sun Skink
Last confirmed Nov 13, 2025 · 12 records
Likely
About 6 in 10 dives
Zebra Dove
Last confirmed Apr 4, 2026 · 12 records
Likely
About 6 in 10 dives
Blue-ringed Octopus
Expected
Known here, not yet in recent logs
Porcupinefish
Expected
Known here, not yet in recent logs
Clown Triggerfish
Expected
Known here, not yet in recent logs
Gear