
Ras Kisimani
Mafia Island · Tanzania
Ras Kisimani is the southernmost point of Mafia Island and one of East Africa's most dramatic open-ocean dives — a rocky headland swept by powerful Indo-Pacific currents where the coral coverage on the exposed face rivals anything in the Mozambique Channel, draped in whip corals, enormous gorgonian fans, and sea whips extending three metres or more into the flow. The current-exposed outer reef reliably produces the park's most impressive pelagic encounters: hammerhead sharks in the June to September season, large schools of barracuda and jacks circling the point, and the occasional tiger shark cruising the deep blue margin of the reef edge.
Conditions
Depth
8 to 40 m
Advanced depths
Current
Can be moderate
Can pick up on the edge
Visibility
20 to 30 m
Clearest in the calm season
Water
23 to 30°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 | 26 | 24 | 23 | 23 | 24 | 25 | 26 | 27 |
| Vis (m) | 15 | 15 | 12 | 8 | 8 | 15 | 20 | 20 | 20 | 18 | 15 | 15 |
| Current | Strong | Strong | Moderate | Strong | Strong | Moderate | Moderate | Moderate | Moderate | Moderate | Strong | Strong |
Your chances of seeing each animal
Green Turtle
Last confirmed Jul 6, 2025 · 1 records
Likely
About 6 in 10 dives
Miller'S Nembrotha
Last confirmed Oct 23, 2025 · 2 records
Likely
About 6 in 10 dives
Common Seahorse
Last confirmed Jun 26, 2024 · 1 records
Sometimes
About 1 in 3 dives
Whale Shark
Last confirmed Jan 14, 2026 · 4 records
Sometimes
About 1 in 3 dives
Leaf Scorpionfish
Last confirmed Mar 1, 2025 · 1 records
Sometimes
About 1 in 3 dives
Giant Trevally
Expected
Known here, not yet in recent logs
Scalloped Hammerhead
Expected
Known here, not yet in recent logs
Gear