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'The Ocean Is Not Supposed to Do This': Earth Reaches Its Hottest Water Temps on Record

Copernicus said the record reflects El Niño and long-term warming from fossil fuels, with ocean heat likely to rise further.

  • On Friday and Saturday, global ocean temperatures reached 21.1 degrees Celsius, narrowly surpassing the previous record set in March 2024, according to Samantha Burgess, strategic climate lead for Copernicus.
  • Burgess attributed the surge to a growing natural El Niño pattern combined with long-term warming from fossil fuel-driven climate change, describing it as a sign of the climate system under significant strain.
  • According to the National Oceanic and Atmospheric Administration, marine heat waves now affect more than 40 percent of the planet's oceans, threatening marine life and global food supplies while fueling storms in the Pacific Ocean.
  • Warm ocean waters fueled Hurricane Lala, which side-swiped Hawaii last week, bringing torrential rain and deadly flooding to the Big Island that killed 93-year-old former kindergarten teacher May Doi.
  • Dalhousie University biology professor Boris Worm called the heat unprecedented, stating, "The ocean is not supposed to do this," while Dr. Jeremy Grist of the National Oceanography Centre projects further records by 2027.
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Center

'The ocean is not supposed to do this': Earth reaches its hottest water temps on record

The world's oceans simmered to their hottest temperatures on record over the weekend, putting stress on life in the water and on land.

·Pittsburgh, United States
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Center

Climate change continues to fuel the world's oceans. Last weekend, according to the EU climate service Copernicus, the highest daily value of the world's average sea surface temperature was recorded.

·Germany
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(Seoul = Yonhap News) Reporter Lee Shin-young = Global sea surface temperatures have once again surpassed all-time highs due to intensifying climate change and El Niño.

·Seoul, Korea (the Republic of)
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Lean Right

The European weather agency has revealed that the average global sea surface temperature has risen to an all-time high, a result of the intensifying El Niño phenomenon.

Lean Left

Warm seas cause flooding, store less carbon dioxide, and intensify storms with heavier rainfall.

·Ljubljana, Slovenia
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  • 82% of the sources are Center
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Xinhua broke the news in Beijing, China on Monday, August 24, 2026.
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