The marine heatwave bulletin provides forecasts and analysis of marine heatwave events across the globe and throughout the year. Used datasets include observations (satellite sea surface temperature maps) and numerical model analyses (assimilating satellite and in situ observations) to derive marine heatwave forecasts for a 10-day period. This week’s forecasts were produced using as a comparison the marine heatwave situation on 22/04/2025

North Pacific Ocean

The marine heatwave in the tropical Atlantic Ocean dispersed and only a few scattered areas remain in moderate category. At 60°W the marine heatwave increases in intensity with strong category. Towards the equator and off the coast of Africa, the moderate to locally strong marine heatwave is intensifying with strong category.

Mean sea surface temperature anomalies in each global ocean region for the week 27 April to 3 May , 2025.

North Atlantic Ocean	-3°C to 2°C
North Pacific Ocean	-3°C to 3°C
Tropical Pacific	-2°C à 2°C
South Pacific	-0.5°C to 3°C
Indian Ocean	-3°C to 3°C

Access the Daily Global Physical Bulletin for a 9-day forecast here.