Sargassum Tracker

USF OOL Long Term Outlook

Oct 31, 2026
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As expected and consistent with all previous years, total Sargassum amount in every region continued to decline substantially in October, more than halved in most regions. However, total amount in every but the east Atlantic still exceeded the maximum or 75 percentiles of historical levels for October.The spatial distribution patterns remained similar to those in September, with a narrow Sargassum “belt” still stretching from the coast of West Africa to the Gulf.

SARGASSUM ABUNDANCE INTENSITY

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Looking ahead: Sargassum amount in all regions will continue to decrease until possibly end of November or December. Meanwhile, beaching events around Florida should be negligible. Some beaching events around the Caribbean will likely continue, but the severity is much lower than in previous months. We will keep a close eye on whether there are anomalous changes in the coming months. All previous monthly bulletins, as well as daily imagery, can be found under the Sargassum Watch System (SaWS). Meanwhile, high-resolution Sargassum maps for selected coastal regions are also available in near real-time under “Satellite Data Products => High Resolution” on the OOL Website.

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Disclaimer

The information bulletin is meant to provide a general outlook of current bloom condition and future bloom probability for the Caribbean Sea. By no means should it be used for commercial purpose, or used for predicting bloom conditions for a specific location or beach. The authors of this bulletin, as well as Caricoos, USF and NASA, take no responsibility for improper use or interpretation of the bulletin. Any use of the image, data, or graph from this bulletin page in reports or publications should obtain permission from the USF OOL group.