El Niño

The busiest day of the Atlantic hurricane season, by the long-run average, is September 10. That day came and went with no hurricane anywhere in the basin, and so did the day after it. When September…

The Copernicus Climate Change Service said August 2026 was the joint warmest month ever recorded, tied with July 2023, at a global average surface air temperature of 16.96 °C. The service, run by the…

Coral skeletons from a Marshall Islands atoll have yielded a monthly-resolution temperature record spanning three windows of the past 1,500 years, and the comparison suggests that Central Pacific El…

The World Meteorological Organization said Sept. 3 that El Niño is firmly established in the tropical Pacific and forecast that it will strengthen into a very strong event before peaking toward the…

Coral skeletons from the Galápagos Islands carry a record of ocean temperature stretching back 1,000 years. Their chemistry shows a large recent increase in year-to-year temperature swings in the…

Take every stretch of open ocean outside the polar seas, average the surface temperature across all of it, and the number you get has a season of its own. It is not the season most people live in. It…

The UK Met Office published a long-range forecast on Aug. 21 showing central tropical Pacific sea-surface temperatures rising more than 3 °C in the coming months, a signal its head of long-range…