Global ocean temperatures hit record high

Global average sea-surface temperatures reached a record 21.1°C on August 22, 2026, according to the European Union — Copernicus Climate Change Service, surpassing the previous record of 21.09°C set in March 2024. The record was driven by a combination of human-induced climate change and a strengthening El Niño–Southern Oscillation event. Copernicus noted that ocean temperatures typically peak in March-April, but this record was set in August, indicating accelerated warming. The El Niño–Southern Oscillation is expected to intensify further, with peak temperatures projected between November and January, potentially reaching unprecedented levels. Scientists warned of severe consequences for marine ecosystems, including coral bleaching, fisheries collapse (notably the Peruvian Anchovy Fishery), and increased frequency of extreme weather events. Warmer oceans also reduce CO2 absorption, exacerbating climate change. Experts including Samantha Burgess, Jane Lubchenco, Boris Worm, John Bruno, and Rick Spinrad expressed deep concern over the implications for food security, economic stability, and coastal communities.