NOAA reading · 20 Oct 2026
Sargassum in Isla Mujeres today
The chance of sargassum washing up at 4 beaches in Isla Mujeres, worst first, from NOAA satellite data refreshed daily.
Today at a glance
- Low risk4
| Beach | Sargassum risk |
|---|---|
| Esduma La Perla Hotel Isla Mujeres | Low risk |
| Green Demon Beach Club Isla Mujeres | Low risk |
| Playa Centro | Low risk |
| Playa Norte | Low risk |
Before you go
Reading Isla Mujeres's numbers
A beach behind the reef or facing away from the open sea often stays clear when its neighbours don't, so compare the list rather than the town as a whole.
How this works
What the reading is, and isn't
- NOAA and the University of South Florida grade the whole Caribbean coastline every day for sargassum inundation risk. Satellites map floating algae, and NOAA compares the 50 to 100 km of sea off each stretch of coast with the days before it. Each beach takes the grade of the coastline nearest to it.
- Four grades, NOAA's own: low risk, watch, medium risk and high risk.
- It is a risk grade, not a count of weed on the sand. Cleanup crews and the last few hours of wind decide what lands, and a beach behind the reef or on the leeward side can stay clear next to a heavy one. Check the local semáforo flag when you arrive.
- When clouds leave NOAA too little to go on there is no reading, and we say so rather than guess. NOAA calls the product experimental. NOAA's daily risk map.