Gulf of Alaska at a glance
- 1,559 maverage depth
- 228 mmedian depth
- 5,479 mmaximum depth
- 407,357 km²water area
Gulf of Alaska is a gulf. Inside its outline the GEBCO grid has about 407,357 km² of water, with an average depth of about 1,559 m (the middle value is 228 m) and a maximum of 5,479 m, found at 55.55° N, 153.18° W.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Gulf of Alaska?
The bar splits the Gulf of Alaska's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 46.7%
- 200 to 1,000 m: 12.3%
- 1,000 to 4,000 m: 27.9%
- 4,000 to 6,000 m: 13.1%
- below 6,000 m: 0%
Named features near the deepest point: Patton Seamount (205 km), Walls Seamount (270 km), Kodiak Seamount (283 km), Cowie Seamount (292 km).
The Gulf of Alaska if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Gulf of Alaska's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 2,948 km² | 0.7% |
| 20 m | 7,336 km² | 1.8% |
| 50 m | 27,408 km² | 6.7% |
| 80 m | 61,538 km² | 15.1% |
| 120 m | 114,225 km² | 28% |
| 200 m | 190,278 km² | 46.7% |
| 500 m | 228,374 km² | 56.1% |
| 1,000 m | 240,311 km² | 59% |
| 2,000 m | 258,521 km² | 63.5% |
| 3,000 m | 278,531 km² | 68.4% |
| 4,000 m | 354,025 km² | 86.9% |
| 6,000 m | 407,357 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
- Bering Sea average depth about 1,844 m
- Chukchi Sea average depth about 42 m
- Beaufort Sea average depth about 1,407 m
- Salish Sea average depth about 130 m
- East Siberian Sea average depth about 26 m
- Shelikhova Gulf average depth about 87 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Gulf of Alaska?
On average about 1,559 m in the GEBCO grid (the middle value is 228 m). The deepest cell inside its outline is 5,479 m, at 55.55° N, 153.18° W.
How big is the Gulf of Alaska?
About 407,357 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Gulf of Alaska would be land if sea level dropped?
With the sea 20 m lower, about 7,336 km² (1.8%) 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 gulf. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.