Global Sea Surface Temperature Reaches Record High as El Niño Strengthens

The global average sea-surface temperature reached a record 21.1°C (70°F) on August 22, 2026, according to Copernicus Climate Pulse data, marking the highest value since records began in 1979. This record is attributed to the combined effects of climate change and a strengthening El Niño in the tropical Pacific. Higher ocean temperatures contribute to sea level rise and increase the likelihood of extreme weather events globally, by transferring more heat and moisture to the atmosphere, intensifying storms and heat on land.