Ocean Floor Map

Gulf of Bothnia depth map

Gulf: average depth about 55 m, deepest 298 m (GEBCO_2026 grid).

Tap or scroll to load the interactive map

Sea level todayDrag the slider to lower the sea and see the land that would appear.

Sea level in metres below today’s. A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how the water would really drain.

Key

Sea depth

  • Deeper than 6,000 m
  • 4,000 to 6,000 m
  • 2,000 to 4,000 m
  • 1,000 to 2,000 m
  • 200 to 1,000 m
  • Shallower than 200 m (the continental shelf)

Land height

  • Land up to 500 m
  • 500 to 2,000 m
  • Above 2,000 m

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  • Seabed exposed when the sea is lowered A dashed white line marks today’s coast.

How to read the map. Darker blue is deeper water. Tap anywhere to see how deep the sea is there, or how high the land is, and the nearest named undersea feature. Depths come from the GEBCO_2026 grid, which in most of the deep ocean is predicted from satellite measurements of the sea surface rather than surveyed by ship, and the map’s tiles are coarser than the grid, so narrow trenches read shallower on the map than their true depth. Not for navigation.

Gulf of Bothnia at a glance

  • 55 maverage depth
  • 50 mmedian depth
  • 298 mmaximum depth
  • 112,153 km²water area

Gulf of Bothnia is a gulf. Inside its outline the GEBCO grid has about 112,153 km² of water, with an average depth of about 55 m (the middle value is 50 m) and a maximum of 298 m, found at 60.18° N, 19.16° E.

Open the map at the deepest cell and tap to read the depth.

How deep is each part of the Gulf of Bothnia?

The bar splits the Gulf of Bothnia's water by depth. Each colour is a depth band, and the shares add up to 100%.

  • 0 to 200 m: 99.5%
  • 200 to 1,000 m: 0.5%
  • 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: Landsort Deep (183 km), Gotland Deep (322 km), Viking-Bergen Banks (959 km), Vøring Plateau (1,028 km).

The Gulf of Bothnia if sea level dropped

The slider on the map lowers the sea in steps. This table shows how much of the Gulf of Bothnia's water would be land at each step.

Sea level lowered byBecomes landShare of its water
10 m14,021 km²12.5%
20 m27,447 km²24.5%
50 m55,816 km²49.8%
80 m83,339 km²74.3%
120 m105,468 km²94%
200 m111,631 km²99.5%
500 m112,153 km²100%
1,000 m112,153 km²100%
2,000 m112,153 km²100%
3,000 m112,153 km²100%
4,000 m112,153 km²100%
6,000 m112,153 km²100%

A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how water would really drain.

Nearby seas

Nearest by the centre of each outline. All oceans and seas

Frequently asked questions

How deep is the Gulf of Bothnia?

On average about 55 m in the GEBCO grid (the middle value is 50 m). The deepest cell inside its outline is 298 m, at 60.18° N, 19.16° E.

How big is the Gulf of Bothnia?

About 112,153 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.

How much of the Gulf of Bothnia would be land if sea level dropped?

With the sea 10 m lower, about 14,021 km² (12.5%) 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.

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