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Ocean heat content reaches record for ninth consecutive year

The upper 2,000 metres of the ocean gained an estimated 23 zettajoules of heat in 2025, driving ocean heat content to a record for the ninth consecutive year.

By DoomRadar · Published on DoomRadar .

Why it matters

Continued ocean warming can intensify climate-related hazards and disrupt marine ecosystems worldwide.

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  1. The upper 2,000 metres of the ocean gained an estimated 23 zettajoules of heat in 2025—roughly 39 times all the energy humanity uses in a year—driving ocean heat content to a record for the ninth consecutive year, the longest unbroken streak ever measured. ↗spacedaily.com · Recorded source date: Aug 29, 2026, 3:16 AM UTC

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