Global ocean temperatures remain near historic highs in 2026, with March recording the second hottest sea surface temperatures ever observed for that month. Scientists warn that persistently overheated oceans are accelerating coral bleaching, disrupting marine ecosystems, and intensifying storms worldwide.

The warming trend is especially alarming because oceans absorb most excess atmospheric heat, meaning rising sea temperatures act as a multiplier for extreme weather events across continents. Researchers say the data points to a dangerous feedback loop where hotter oceans weaken natural climate regulation systems while increasing pressure on fisheries, coastal livelihoods, and marine biodiversity.