Porpoise Bay at a glance
- 563 maverage depth
- 552 mmedian depth
- 985 mmaximum depth
- 7,528 km²water area
Porpoise Bay is a bay. Inside its outline the GEBCO grid has about 7,528 km² of water, with an average depth of about 563 m (the middle value is 552 m) and a maximum of 985 m, found at 66.67° S, 128.44° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Porpoise Bay?
The bar splits the Porpoise Bay's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 2.5%
- 200 to 1,000 m: 97.5%
- 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: Dibble Basin (254 km), Lamarck Canyon (476 km), Cuvier Canyon (574 km), Jussieu Canyon (677 km).
The Porpoise Bay if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Porpoise Bay's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 12 km² | 0.2% |
| 20 m | 26 km² | 0.3% |
| 50 m | 54 km² | 0.7% |
| 80 m | 88 km² | 1.2% |
| 120 m | 119 km² | 1.6% |
| 200 m | 189 km² | 2.5% |
| 500 m | 3,023 km² | 40.2% |
| 1,000 m | 7,528 km² | 100% |
| 2,000 m | 7,528 km² | 100% |
| 3,000 m | 7,528 km² | 100% |
| 4,000 m | 7,528 km² | 100% |
| 6,000 m | 7,528 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
- Davis Sea average depth about 1,562 m
- Ross Sea average depth about 2,026 m
- Great Australian Bight average depth about 3,184 m
- Tasman Sea average depth about 3,360 m
- Amundsen Sea average depth about 603 m
- Weddell Sea average depth about 1,552 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Porpoise Bay?
On average about 563 m in the GEBCO grid (the middle value is 552 m). The deepest cell inside its outline is 985 m, at 66.67° S, 128.44° E.
How big is the Porpoise Bay?
About 7,528 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Porpoise Bay would be land if sea level dropped?
With the sea 80 m lower, about 88 km² (1.2%) 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.