See where sargassum seaweed is heading, before it reaches the beach.

A free, public-beta sargassum seaweed map for the Caribbean and Florida. It combines satellite detections with ocean currents and wind to give a 3-day drift forecast and a beach-landing forecast showing which shores are likely to receive seaweed.

• Live weed detections from NOAA and NASA satellites across the whole Atlantic belt, Caribbean, Gulf and Florida.
• 3-day drift and beach-landing forecast, with a BVI beaching forecast down to individual shores.
• History mode plays back 12 months of sargassum mat movement across the Atlantic, following mat families as they drift, split and merge from the tropical Atlantic and Sargasso Sea into the Caribbean.
• Beach reports from visitors, beach webcams and feedback to improve the map.

Free to use: create an account with your email (or Google) to see your region and open the map. Forecasts are estimates, not guarantees: always check local conditions.