Average sea surface temperature outside polar regions was 21.1C on Saturday, latest data finds
The world’s oceans were hotter than ever previously recorded on Saturday, according to the latest data.
The average surface temperature was 21.1C, with the rising marine heat a stark indicator of the climate crisis. More than 90% of the heat trapped by carbon dioxide from fossil fuel burning enters the oceans.
Hotter oceans exacerbate the sea level rise and extreme storms that threaten billions of people, as well as driving marine heatwaves that decimate sea life and undermine coastal livelihoods, scientists warned.
The northern hemisphere summer has already been hit by record-breaking heatwaves, drought and wildfires in Europe and North America, and intense rain and typhoons in Asia.
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See the original article at https://www.theguardian.com/environment/2026/aug/24/worlds-oceans-hit-hottest-temperature-on-record-in-august
