Highest-ever ocean temperature recorded as super El Nino forms

Scientists have recorded the highest temperature ever measured in the world's oceans, as climate change combines with a powerful El Nino in the tropical Pacific. The global average sea-surface temperature hit a record 21.1 degrees Celsius on Aug. 22, according to Europe’s Earth observation agency Copernicus, which has been tracking the metric daily since 1979. The previous single-day record of 21.09 C was measured in March 2024.

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