Map provided by SIMAR Sargassum SATSUM- CONABIO – (10-Day Outlook)
Sargassum arrivals in Atlantic – Caribbean Sea – Gulf of Mexico can vary significantly depending on ocean currents, wind conditions, sea state and the distribution of floating sargassum across the Caribbean.
Our sargassum monitoring information helps identify areas where significant amounts of floating sargassum are present offshore and where coastal areas may potentially be affected. These observations provide an early indication of possible sargassum arrivals and can support preparation and coastal management.
Because ocean conditions can change rapidly, a sargassum forecast should be understood as an indication of potential coastal impact rather than an exact prediction of when and where sargassum will reach a specific beach.
Updated on October 28, 2026
Latest Map from USF – SaWS
Legend of the USF-SaWS Map :
Images are an interpretation of satellite images.
Updated on October 29, 2026
Sargassum map – Caribbean Sea
How are Sargassum stranding forecasts calculated ?
Sargassum movement forecasting method :
Each red dot corresponds to a sargassum patch identified by the “AFAI” thanks to satellites. The sargassum layer is influenced by environmental conditions in the area, such as currents and winds. Based on current forecasts from “HYCOM” and wind forecasts from “NCEP”, it is possible to estimate the trajectory of the sargassum and its possible arrival along Caribbean beaches.
The image in this animation corresponds to 7 days, as you can see from the dates at the top of the image.
These forecasts give a general indication, but their reliability is limited to current knowledge of sargassum.
Sargassum trajectories – Diffusion + currents (HYCOM) + windage (NCEP)
Updated on October 26, 2026
This information is provided by the Mexican government.
