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Outlook of 2026 Sargassum blooms – September 30, 2026

A perspective for the Caribbean Sea and Gulf of America by 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 September 2026, with warm colors representing higher abundance. The top color (dark red) indicates that 0.5% of the ocean surface is covered… Read More Sargassum outlook bulletin for the month of September 2026.