• Large marine heatwave persists off the U.S. West Coast since summer 2025

    ByReet Kaur

    A large marine heatwave has persisted along the U.S. West Coast since summer 2025, raising sea surface temperatures about 1.7–2.2°C (3–4°F) above average across parts of the Northeast Pacific. In a report published March 3, 2026, the National Oceanic and Atmospheric Administration (NOAA) Fisheries said this is only the third time in the observational record for the California Current ecosystem that such a large portion of coastal waters has remained anomalously warm for so long into winter without El Niño conditions.

  • Strong North Pacific SST anomaly raises probability of colder winter 2025/26 in U.S. and Canada

    ByRishav Kothari

    A large sea surface temperature anomaly has developed in the North Pacific Ocean, extending toward the U.S. West Coast. Forecasts suggest the anomaly could help trigger colder-than-average conditions across central and eastern United States and Canada during the upcoming 2025/26 winter season, with a weak La Niña further reinforcing the setup.

  • Strongest marine heat wave in 40 years off Canada’s East Coast

    ByTW

    A severe marine heat wave was recorded off Canada’s East Coast this summer, according to data compiled by Fisheries and Oceans climate scientist Peter Galbraith. The event, lasting from the last three weeks of July to the first week of August, saw a weeklong temperature spike off Newfoundland averaging 6.7 °C (12.1 °F) above normal.