Geographe Bay at a glance
- 70 maverage depth
- 38 mmedian depth
- 1,615 mmaximum depth
- 17,314 km²water area
Geographe Bay is a bay. Inside its outline the GEBCO grid has about 17,314 km² of water, with an average depth of about 70 m (the middle value is 38 m) and a maximum of 1,615 m, found at 32.01° S, 115.02° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Geographe Bay?
The bar splits the Geographe Bay's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 94.7%
- 200 to 1,000 m: 4.9%
- 1,000 to 4,000 m: 0.4%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Perth Canyon (4 km), Naturaliste Plateau (418 km), Diamantina Fracture Zone (1,074 km), Diamantina Deep (1,074 km).
The Geographe Bay if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Geographe Bay's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 634 km² | 3.7% |
| 20 m | 2,571 km² | 14.9% |
| 50 m | 13,481 km² | 77.9% |
| 80 m | 14,256 km² | 82.3% |
| 120 m | 15,016 km² | 86.7% |
| 200 m | 16,394 km² | 94.7% |
| 500 m | 16,993 km² | 98.1% |
| 1,000 m | 17,247 km² | 99.6% |
| 2,000 m | 17,314 km² | 100% |
| 3,000 m | 17,314 km² | 100% |
| 4,000 m | 17,314 km² | 100% |
| 6,000 m | 17,314 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
- Great Australian Bight average depth about 3,184 m
- Savu Sea average depth about 1,867 m
- Timor Sea average depth about 466 m
- Bali Sea average depth about 741 m
- Flores Sea average depth about 1,745 m
- Java Sea average depth about 91 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Geographe Bay?
On average about 70 m in the GEBCO grid (the middle value is 38 m). The deepest cell inside its outline is 1,615 m, at 32.01° S, 115.02° E.
How big is the Geographe Bay?
About 17,314 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Geographe Bay would be land if sea level dropped?
With the sea 10 m lower, about 634 km² (3.7%) 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.