Bay of Plenty at a glance
- 397 maverage depth
- 188 mmedian depth
- 1,900 mmaximum depth
- 13,567 km²water area
Bay of Plenty is a bay. Inside its outline the GEBCO grid has about 13,567 km² of water, with an average depth of about 397 m (the middle value is 188 m) and a maximum of 1,900 m, found at 37.29° S, 177.43° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Bay of Plenty?
The bar splits the Bay of Plenty's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 50.7%
- 200 to 1,000 m: 38.4%
- 1,000 to 4,000 m: 10.9%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Whakaari / White Island Ridge (18 km), Whakaari / White Island Canyon (37 km), East Ngātoro Knoll (39 km), Rungapapa Knoll (49 km).
The Bay of Plenty if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Bay of Plenty's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 152 km² | 1.1% |
| 20 m | 513 km² | 3.8% |
| 50 m | 2,538 km² | 18.7% |
| 80 m | 4,260 km² | 31.4% |
| 120 m | 5,768 km² | 42.5% |
| 200 m | 6,877 km² | 50.7% |
| 500 m | 8,915 km² | 65.7% |
| 1,000 m | 12,083 km² | 89.1% |
| 2,000 m | 13,567 km² | 100% |
| 3,000 m | 13,567 km² | 100% |
| 4,000 m | 13,567 km² | 100% |
| 6,000 m | 13,567 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
- Tasman Sea average depth about 3,360 m
- Coral Sea average depth about 2,553 m
- Great Australian Bight average depth about 3,184 m
- Solomon Sea average depth about 2,825 m
- Gulf of Carpentaria average depth about 41 m
- Ross Sea average depth about 2,026 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Bay of Plenty?
On average about 397 m in the GEBCO grid (the middle value is 188 m). The deepest cell inside its outline is 1,900 m, at 37.29° S, 177.43° E.
How big is the Bay of Plenty?
About 13,567 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Bay of Plenty would be land if sea level dropped?
With the sea 10 m lower, about 152 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 bay. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.