Bismarck Sea at a glance
- 1,629 maverage depth
- 1,762 mmedian depth
- 4,246 mmaximum depth
- 327,149 km²water area
Bismarck Sea is a sea. Inside its outline the GEBCO grid has about 327,149 km² of water, with an average depth of about 1,629 m (the middle value is 1,762 m) and a maximum of 4,246 m, found at 2.61° S, 142.19° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Bismarck Sea?
The bar splits the Bismarck Sea's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 4.6%
- 200 to 1,000 m: 14.8%
- 1,000 to 4,000 m: 80.6%
- 4,000 to 6,000 m: 0.1%
- below 6,000 m: 0%
Named features near the deepest point: Manus Trench (587 km), Titan Ridge Volcano (623 km), Markham Canyon (704 km), Francisco Canyon (734 km).
The Bismarck Sea if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Bismarck Sea's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 3,687 km² | 1.1% |
| 20 m | 5,365 km² | 1.6% |
| 50 m | 8,184 km² | 2.5% |
| 80 m | 9,958 km² | 3% |
| 120 m | 11,822 km² | 3.6% |
| 200 m | 14,889 km² | 4.6% |
| 500 m | 25,464 km² | 7.8% |
| 1,000 m | 63,365 km² | 19.4% |
| 2,000 m | 216,739 km² | 66.3% |
| 3,000 m | 321,456 km² | 98.3% |
| 4,000 m | 326,868 km² | 99.9% |
| 6,000 m | 327,149 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
- Solomon Sea average depth about 2,825 m
- Arafura Sea average depth about 191 m
- Gulf of Carpentaria average depth about 41 m
- Ceram Sea average depth about 1,196 m
- Coral Sea average depth about 2,553 m
- Halmahera Sea average depth about 799 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Bismarck Sea?
On average about 1,629 m in the GEBCO grid (the middle value is 1,762 m). The deepest cell inside its outline is 4,246 m, at 2.61° S, 142.19° E.
How big is the Bismarck Sea?
About 327,149 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Bismarck Sea would be land if sea level dropped?
With the sea 10 m lower, about 3,687 km² (1.1%) 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 sea. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.