Bight of Biafra at a glance
- 177 maverage depth
- 41 mmedian depth
- 1,683 mmaximum depth
- 29,300 km²water area
Bight of Biafra is a bay. Inside its outline the GEBCO grid has about 29,300 km² of water, with an average depth of about 177 m (the middle value is 41 m) and a maximum of 1,683 m, found at 3.10° N, 9.10° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Bight of Biafra?
The bar splits the Bight of Biafra's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 82.2%
- 200 to 1,000 m: 12.1%
- 1,000 to 4,000 m: 5.7%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Congo Canyon (1,052 km), Guinea Basin (1,354 km), Le Trou sans Fond (1,468 km), Angola Basin (2,140 km).
The Bight of Biafra if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Bight of Biafra's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 4,620 km² | 15.8% |
| 20 m | 8,817 km² | 30.1% |
| 50 m | 16,143 km² | 55.1% |
| 80 m | 21,056 km² | 71.9% |
| 120 m | 23,240 km² | 79.3% |
| 200 m | 24,069 km² | 82.1% |
| 500 m | 25,265 km² | 86.2% |
| 1,000 m | 27,620 km² | 94.3% |
| 2,000 m | 29,300 km² | 100% |
| 3,000 m | 29,300 km² | 100% |
| 4,000 m | 29,300 km² | 100% |
| 6,000 m | 29,300 km² | 100% |
A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how water would really drain.
Nearby seas
- Gulf of Guinea average depth about 2,882 m
- Red Sea average depth about 504 m
- Mediterranean Sea average depth about 1,844 m
- Alboran Sea average depth about 760 m
- Ionian Sea average depth about 2,122 m
- Sea of Crete average depth about 696 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Bight of Biafra?
On average about 177 m in the GEBCO grid (the middle value is 41 m). The deepest cell inside its outline is 1,683 m, at 3.10° N, 9.10° E.
How big is the Bight of Biafra?
About 29,300 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Bight of Biafra would be land if sea level dropped?
With the sea 10 m lower, about 4,620 km² (15.8%) of its water would be land. At 6,000 m lower, 100% would be. This is a simple bathtub model that lowers the sea evenly everywhere.
Data: depths from the GEBCO_2026 grid, statistics worked out inside the Natural Earth outline of the bay. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.