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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 Sargassum Outlook 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 SST categ_global_GLO12V4_SST_0m_FCST_2025-12-06-1-1024x561