Gulf of Mannar at a glance
- 763 maverage depth
- 763 mmedian depth
- 2,348 mmaximum depth
- 34,203 km²water area
Gulf of Mannar is a gulf. Inside its outline the GEBCO grid has about 34,203 km² of water, with an average depth of about 763 m (the middle value is 763 m) and a maximum of 2,348 m, found at 7.54° N, 79.14° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Gulf of Mannar?
The bar splits the Gulf of Mannar's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 41.3%
- 200 to 1,000 m: 14.8%
- 1,000 to 4,000 m: 43.9%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Arabian Basin (1,578 km), Carlsberg Ridge (1,593 km), Ninety East Ridge (1,681 km), Mascarene Plateau (2,957 km).
The Gulf of Mannar if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Gulf of Mannar's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 3,371 km² | 9.9% |
| 20 m | 7,517 km² | 22% |
| 50 m | 12,851 km² | 37.6% |
| 80 m | 13,272 km² | 38.8% |
| 120 m | 13,581 km² | 39.7% |
| 200 m | 14,131 km² | 41.3% |
| 500 m | 15,781 km² | 46.1% |
| 1,000 m | 19,201 km² | 56.1% |
| 2,000 m | 32,971 km² | 96.4% |
| 3,000 m | 34,203 km² | 100% |
| 4,000 m | 34,203 km² | 100% |
| 6,000 m | 34,203 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
- Laccadive Sea average depth about 1,956 m
- Bay of Bengal average depth about 2,608 m
- Arabian Sea average depth about 3,313 m
- Andaman Sea average depth about 1,071 m
- Gulf of Thailand average depth about 42 m
- Gulf of Oman average depth about 1,437 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Gulf of Mannar?
On average about 763 m in the GEBCO grid (the middle value is 763 m). The deepest cell inside its outline is 2,348 m, at 7.54° N, 79.14° E.
How big is the Gulf of Mannar?
About 34,203 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Gulf of Mannar would be land if sea level dropped?
With the sea 10 m lower, about 3,371 km² (9.9%) 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 gulf. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.