Which ocean current is known as the strongest ocean current on Earth?

The Antarctic Circumpolar Current is widely regarded as the strongest ocean current on Earth.

It flows eastward around Antarctica, linking the Atlantic, Indian, and Pacific oceans. Unlike most major currents, it can travel continuously around the globe without being blocked by a continent. The current is driven by persistent westerly winds and shaped by the Southern Ocean’s fronts, depth, and seafloor relief.

Its transport is often estimated at roughly 135 million cubic metres of water per second near the Drake Passage, though exact estimates vary with location and measurement method. This immense flow helps exchange heat, salt, carbon, and nutrients between ocean basins.

The Gulf Stream is warmer and extremely important to North Atlantic climate, but it carries less total water. The Antarctic Circumpolar Current also helps isolate Antarctica climatically, contributing to the continent’s long-term cold conditions.