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 3/06/2025.

The marine heatwave in the Gulf of Mexico decreases in intensity as the strong category is reduced.  The marine heatwave east of Florida intensifies, with more surface area in the strong category, but the overall surface area of the MHW decreases.