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 01/07/2025.

Tropical Atlantic

The marine heatwave in the Gulf of Mexico and South of Cuba is increasing in intensity, with strong to locally extreme categories.

North Atlantic	-2°C to 3°C
Mediterranean Sea	-1°C to >3°C
Tropical Atlantic	-2°C to 2°C
North Pacific	-3°C < à >3°C
Indian Ocean	-3°C to 2°C

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