Seaweed risk at Chen Río
Cozumel · Cozumel's east shore
NOAA rated the seaweed risk for the coast around Chen Río as medium on November 12, 2026. That is lower than the week before.
The level describes sargassum offshore that could arrive. It is not a view of the sand, and it is not a forecast.
- Low
- Warning
- Medium (the newest level)
- High
The last 14 days
October 30 – November 12, 2026
- October 30: high
- October 31: medium
- November 1: high
- November 2: high
- November 3: high
- November 4: high
- November 5: high
- November 6: high
- November 7: high
- November 8: medium
- November 9: medium
- November 10: medium
- November 11: medium
- November 12: medium
One mark for each day of NOAA data. The taller and darker the mark, the higher the risk for the coast around Chen Río. A dotted mark is a day NOAA published no map.
Month by month
Days at each level, July 2025 – November 2026. A minus after a month counts days NOAA published no map.
- L
- Low
- W
- Warning
- M
- Medium
- H
- High
| Month | Days by level | L | W | M | H |
|---|---|---|---|---|---|
| 2025 | |||||
| Jul | 0 | 0 | 0 | 31 | |
| Aug | 0 | 0 | 6 | 25 | |
| Sep | 5 | 0 | 9 | 16 | |
| Oct | 24 | 5 | 2 | 0 | |
| Nov | 30 | 0 | 0 | 0 | |
| Dec | 31 | 0 | 0 | 0 | |
| 2026 | |||||
| Jan | 0 | 0 | 26 | 5 | |
| Feb | 5 | 2 | 14 | 7 | |
| Mar | 0 | 0 | 10 | 21 | |
| Apr | 1 | 0 | 7 | 22 | |
| May | 0 | 0 | 5 | 26 | |
| Jun −3 | 0 | 0 | 8 | 19 | |
| Jul −1 | 0 | 0 | 0 | 30 | |
| Aug −1 | 0 | 0 | 0 | 30 | |
| Sep −1 | 0 | 0 | 12 | 17 | |
| Oct | 1 | 0 | 9 | 21 | |
| Nov | 0 | 0 | 5 | 7 | |
Which way it faces
Faces east, open to the open Caribbean.
Beaches open to the sea on that side are usually the first to collect seaweed when it arrives.
The sheltered beach nearby
Playa Palancar, 16 km west, faces west.
NOAA’s newest level for the coast around it is medium.
Morning report
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Questions
- Is there seaweed at Chen Río right now?
- Satellites cannot see the sand, so nobody can say from this data alone. As of November 12, 2026, NOAA rates the risk for the coast around Chen Río as medium. That is about sargassum offshore that could come in.
- Which months are worst for seaweed around Chen Río?
- In NOAA's daily record since July 2025, the months with the most medium or high days for this coast were July 2025 (31 of 31 days), August 2025 (31 of 31 days) and January 2026 (31 of 31 days). November 2025 and December 2025 had none.
- Does it matter which way Chen Río faces?
- Chen Río faces east, onto the open Caribbean. Beaches open to the sea on that side are usually the first to collect seaweed when it arrives.
- Where does the level come from?
- From NOAA's Sargassum Inundation Risk map, which NOAA publishes daily and labels experimental. NOAA scores the shoreline in long runs. On that day this beach sat in a run of about 108 km with one level for all of it. A beach and its neighbour can share a level and still look different on the ground.
- How often does this page change?
- Once a day, by itself, after NOAA posts its map. NOAA's map runs one to two days behind the calendar, so the page always shows the date of the data it is quoting.
Sources and limits
Data courtesy of NOAA/AOML, NOAA CoastWatch, and USF.
The level comes from NOAA’s daily Sargassum Inundation Risk product, which NOAA calls experimental, not a forecast. NOAA scores the shoreline in long runs. On that day this beach sat in a run of about 108 km with one level for all of it. Medium is the third of NOAA's four levels: a fair amount of floating sargassum is in the waters off this coast and landings are likely somewhere along it.
NOAA's map from 2 days ago, the newest it has published. Seaweed Radar rewrites this page once a day by itself. NOAA does not endorse this site. How it works