Sargassum Tracker

USF OOL Long Term Outlook

May 31, 2026
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As predicted last month, the total Sargassum amount in most regions continued to increase in May, with every region but the West Atlantic region continuing to show record-high Sargassum amounts for May. Further details can be found in the attached bulletin.

USF Sargassum Outlook 2026 - Bulletin 05

Major beaching events have been reported around the Caribbean and the Lesser Antilles, as well as along the Florida Keys and the east coast of Florida.

SARGASSUM ABUNDANCE INTENSITY

Details

Looking ahead: Sargassum amounts in most regions are likely to increase in June. Beaching events around the Caribbean and the southeast coast of Florida will continue and likely increase. The year 2026 is set to be another major Sargassum year (i.e., Sargassum amount exceeds 75% of historical values) and possibly to be a record year by summer 2026. 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.