Climate Change and El Niño Push Global Oceans to New Heat Record

Global sea surface temperatures have reached their highest level ever recorded, according to the European Union’s Copernicus Climate Change Service.

The agency reported that average global ocean temperatures reached 21.1°C (69.98°F) on August 21 and 22, exceeding the previous record of 21.09°C, recorded in March 2024.

Scientists said the record is particularly concerning because ocean temperatures normally peak around March and April. This year’s record in August is being driven by the combination of El Niño and long-term human-caused climate change.

El Niño is expected to strengthen and could reach its peak between November and January, potentially reaching levels not seen for several decades.

Warmer oceans can cause sea-level rise, stronger marine heatwaves, coral reef damage and disruption of marine ecosystems. They can also affect fishing and aquaculture, while reducing the ocean’s ability to absorb carbon dioxide.

Scientists warn that hotter oceans can also increase heat and moisture in the atmosphere, raising the potential for more extreme weather events.

Experts described the record as a serious warning about the growing impact of climate change on weather patterns, food security, economies and marine life.

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