Oceans hit highest temperature on record
Points and comments are a snapshot, not live.
The world's oceans hit a record average surface temperature of 21.1C, driven by climate change and El Niño.
The average surface temperature of the world's oceans outside polar regions reached 21.1C on Saturday, edging past the previous record of 21.09C from March 2024. The record is notable because it occurs in August, not the typical March-April peak. The warmth is fueled by both human-caused climate change and the growing El Niño, which is expected to strengthen until Christmas. Warmer oceans can supercharge extreme weather, raise sea levels, and harm marine life, including coral reefs. The western English Channel has seen marine heatwave conditions for over three years, peaking at 7C above normal in July.
What commenters are saying
Commenters largely express concern, with many noting that small temperature increases have outsized impacts. A recurring theme is that no region is truly insulated from effects due to global supply chains and cascading failures. Some point to specific consequences: US cattle herds at record lows, European nuclear reactors lacking cooling water, and London homes cracking from subsidence after heat waves. One commenter cites the U.S. military treating climate change as a destabilizing threat. A few skeptics dismiss the record, but they are outnumbered.