The Oceans Were Hotter Than Ever in 2025

The Earth’s oceans were hotter in 2025 than in any year since modern measurements began, marking a dangerous new record. 

New analysis published in the peer-reviewed journal Advances in Atmospheric Sciences on Friday found that the upper 2,000 meters (6,561 ft.) of the ocean absorbed a record-setting 23 zettajoules more energy than in 2024—equivelant to roughly 37 times more energy than the world consumed in 2023. 

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The study examined ocean heat content...