The marine heat wave off the Breton coast increases in intensity with strong category. The marine heat wave in North Sea and Norway Sea decreases in extent with moderate and strong categories.
The marine heat wave in the Gulf of Mexico, around Cuba and Florida increases in intensity with strong and locally sever categories.
The marine heatwave presents in the South China Sea increases in intensity, with moderate to strong categories.
The marine heat wave presents in the centre of the basin at around 30°N and 60°N decreases in extent and increases in intensity off the Canadian coast with moderate to strong categories. The marine heatwave in the Sea of Japan and the Sea of Okhotsk decreases in intensity and in extent. The marine heat wave in the Sea Okhotsk have strong to sever categories.
The marine heatwave in the central basin is decreasing in extent. The marine heat wave in the Bay of Bengal increases in intensity with mostly strong category.
Mean sea surface temperature for the week 3 – 9 August 2025
| Mediterranean Sea | -1°C à 1.5°C |
| North Atlantic | -2°C à >3°C |
| North Pacific | –1.5°C à >3°C |
| Tropical Pacific | –2.5°C à 2.5°C |
| Indien Ocean | -3°C < à 2.5°C |
Help us improve our content! Answer a quick survey about this bulletin here.
Datasets and products: Global Ocean Physics Analysis and Forecast (sea surface temperature) E.U. Copernicus Marine Service/ Mercator Ocean International. https://doi.org/10.48670/moi-00016
