The U.S. Government is closed. This site will not be updated; however NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit www.commerce.gov. For the latest forecast and critical weather information, visit www.weather.gov. 

The U.S. government is closed. This site will not be updated; however, NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit commerce.gov. 

For the latest forecasts and critical weather information, visit weather.gov.

Outlook indicates high levels of Sargassum in the eastern Caribbean Sea and west Atlantic

Woman worker raking sargassum seaweed marine plant. Extreme work under the sun.

A recent outlook indicates surprisingly high levels of Sargassum in the eastern Caribbean Sea and west Atlantic – 200% higher than their historical records in April. The total Sargassum amount across the Caribbean Sea and Gulf region sets a new record that exceeds the all-time high previously set in  June 2022. 

A NOAA-funded effort supported the development of higher-resolution Sargassum maps for the lower Florida Keys and upper Florida Keys. These new maps will be combined with circulation models to have a short-term forecast of Sargassum transport, and such a capacity will be expanded to other regions in the near future. 

https://optics.marine.usf.edu/projects/SaWS/pdf/Sargassum_outlook_2025_bulletin04_USF.pdf