Gulf of Thailand at a glance
- 42 maverage depth
- 45 mmedian depth
- 107 mmaximum depth
- 293,746 km²water area
Gulf of Thailand is a gulf. Inside its outline the GEBCO grid has about 293,746 km² of water, with an average depth of about 42 m (the middle value is 45 m) and a maximum of 107 m, found at 7.84° N, 102.51° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Gulf of Thailand?
The bar splits the Gulf of Thailand's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 100%
- 200 to 1,000 m: 0%
- 1,000 to 4,000 m: 0%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Reed Tablemount (1,618 km), Ninety East Ridge (1,837 km), Manila Trench (1,953 km), Sulu Trench (2,084 km).
The Gulf of Thailand if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Gulf of Thailand's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 19,512 km² | 6.6% |
| 20 m | 52,343 km² | 17.8% |
| 50 m | 172,563 km² | 58.7% |
| 80 m | 293,209 km² | 99.8% |
| 120 m | 293,746 km² | 100% |
| 200 m | 293,746 km² | 100% |
| 500 m | 293,746 km² | 100% |
| 1,000 m | 293,746 km² | 100% |
| 2,000 m | 293,746 km² | 100% |
| 3,000 m | 293,746 km² | 100% |
| 4,000 m | 293,746 km² | 100% |
| 6,000 m | 293,746 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
- Andaman Sea average depth about 1,071 m
- South China Sea average depth about 1,354 m
- Gulf of Tonkin average depth about 36 m
- Bay of Bengal average depth about 2,608 m
- Java Sea average depth about 91 m
- Sulu Sea average depth about 1,639 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Gulf of Thailand?
On average about 42 m in the GEBCO grid (the middle value is 45 m). The deepest cell inside its outline is 107 m, at 7.84° N, 102.51° E.
How big is the Gulf of Thailand?
About 293,746 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Gulf of Thailand would be land if sea level dropped?
With the sea 10 m lower, about 19,512 km² (6.6%) 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.