Experimental Weekly Sargassum Inundation Risk (SIR v1.3) By the National Oceanic and Atmospheric Administration (NOAA), and the University of South Florida (USF) Status:Dec 2-8, 2025
Marine heatwave Bulletin Forecasts for December 13, 2025
Key takeaways Marine heatwave categories Tropical Atlantic The marine heatwave at 60°S in the Southern Ocean decreases in intensity, with moderate and strong and locally severe categories. South Atlantic The marine heatwave around 30°S decreases in extent and intensity with the moderate category. Tropical Pacific The marine heatwave at the Philippines East decreases in extent… Read More
Outlook of 2025 Sargassum Blooms – December 1, 2025
A perspective for the Caribbean Sea and Gulf of America* by the University of South Florida Optical Oceanography Lab – (bbarnes4@usf.edu, yuyuan@usf.edu, huc@usf.edu) The map above shows the average Sargassum abundance for the month of November 2025, with warm colors representing higher abundance. The top color (red) indicates that 0.4% of the ocean surface is… Read More
Experimental Weekly Sargassum Inundation Risk (SIR v1.3) By the National Oceanic and Atmospheric Administration (NOAA), and the University of South Florida (USF) Status: Nov 25- Dec 1, 2025
Marine heatwave Bulletin Forecasts for December 6, 2025
Key takeaways Marine heatwave categories Tropical Atlantic The marine heatwave affecting the basin is decreasing in extent while remaining in the moderate and strong categories. The marine heatwave west of Liberia is decreasing in extent, and only one scattered area remains in the moderate and strong categories. Weekly temperature anomalies Tropical Atlantic 0°C to 2°C… Read More
Marine heatwave Bulletin Forecasts for November 29, 2025 by Mercator International
Key takeaways Tropical Atlantic The extent and the intensity of the marine heatwave impacting the basin are stable in moderate to strong categories, except for marine heatwave along the African coast around 15°N which is diminishing in both intensity and area, and is now in moderate category. Weekly temperature anomalies Tropical Atlantic 0°C to 2°C South… Read More
Marine heatwave Bulletin Forecasts for November 22, 2025 by Mercator International
Key takeaways Tropical Atlantic The extent of the marine heatwave in the Gulf of Mexico and the Caribbean Sea is decreasing, but its intensity remains moderate overall. The extent of the marine heatwave in the center of the basin is decreasing, but its intensity remains stable overall. The marine heatwave along the African coast around… Read More
Experimental Weekly Sargassum Inundation Risk (SIR v1.3) By the National Oceanic and Atmospheric Administration (NOAA), and the University of South Florida (USF) Status: Nov 11-17, 2025
Marine Heatwave Bulletin Forecasts for November 15, 2025 by Mercator International
Key takeaways Tropical Atlantic The extent and intensity of the marine heatwave in the Gulf of Mexico and the Caribbean Sea are decreasing. Only a few scattered areas remain under the moderate category. The marine heatwave around 30°W is decreasing in extent, falling into the moderate category, and locally into the strong category. The marine… Read More
