The ocean covers more than 70% of the planet’s surface and plays a central role in controlling global weather. In 2026, ocean temperatures reached the highest levels ever recorded by scientists.
While people usually notice warm air temperatures, most excess heat from global warming actually goes straight into the sea. This stored heat is now affecting the atmosphere, triggering powerful heat waves, wildfires, and severe drought.
Here is a closer look at how a warming ocean is reshaping weather, life on land, and the marine ecosystem. Click on to find out more.