Global ocean surface temperatures have reached the highest level in recorded history for the third consecutive month, with scientists warning of cascading impacts on marine life, fisheries, and weather patterns.

The Data

Average sea surface temperature hit 21.2°C in March 2026, breaking the previous record by 0.15°C. The North Atlantic is particularly anomalous, running 1.5°C above the 1991-2020 average.

Consequences

Mass coral bleaching is occurring across the Caribbean and Pacific. Fish stocks are migrating to cooler waters, devastating traditional fishing communities. Hurricane fuel is being supercharged.