
Passe Houareau
Aldabra Atoll · Seychelles
Passe Houareau is the primary channel into Aldabra's vast lagoon, a world-class drift dive where the Indian Ocean's remote, unpolluted waters deliver extraordinary visibility and dense pelagic life. Schools of scalloped hammerheads patrol the channel margins while oceanic manta rays soar through the blue water above pristine coral formations. The remoteness of Aldabra means virtually no diving pressure, and the marine life here exhibits a fearlessness rarely encountered at more accessible destinations.
Conditions
Depth
10 to 40 m
Advanced depths
Current
Often strong
Can pick up on the edge
Visibility
20 to 35 m
Clearest in the calm season
Water
26 to 31°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 26 | 26 | 27 | 28 | 28 | 27 | 26 | 26 | 26 | 27 | 27 | 26 |
| Vis (m) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Current | Strong | Strong | Moderate | Gentle | Moderate | Strong | Strong | Strong | Strong | Moderate | Moderate | Strong |
Your chances of seeing each animal
White-Throated Rail
Last confirmed May 14, 2026 · 9 records
Likely
About 6 in 10 dives
Coconut Crab
Last confirmed May 14, 2026 · 10 records
Likely
About 6 in 10 dives
Brown Noddy
Last confirmed Mar 14, 2025 · 6 records
Likely
About 6 in 10 dives
Great Frigatebird
Last confirmed Mar 14, 2025 · 3 records
Rare
Now and then
Green Sea Turtle
Expected
Known here, not yet in recent logs
Scalloped Hammerhead Shark
Expected
Known here, not yet in recent logs
Oceanic Manta Ray
Expected
Known here, not yet in recent logs
Gear