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 18/03/2025

Tropical Atlantic Ocean

The global extent of the marine heatwaves in the Tropical Atlantic is decreasing. In the Caribbean Sea, the intensity of the marine heatwave is falling and only an area to the south of the Dominican Republic and Puerto Rico remains in the strong category, while most of the rest is now in moderate category. 

Mean sea surface temperature anomalies in each global ocean region for the week 23 to 29 March, 2025.

Mediterranean Sea	0°C to 2°C
Tropical Pacific Ocean	-1°C to 3°C
South Pacific Ocean	-1°C à 3°C
Tropical Atlantic Ocean	-1°C to 2°C
Indian Ocean	-1°C to 3°C

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