Methodology & measured forecast accuracy

Updated June 10, 2026 from Copernicus satellite data — refreshed 4× per day.

We sample the AFAI (floating algae) index from Copernicus/NOAA satellites 4 times a day, pixel by pixel in front of each beach — not a regional average. A weighted daily correction and a beach memory (multi-day half-life) turn the satellite signal into the status you see on the map. The 7-day forecast combines persistence, wind and offshore sargassum-bank detection.

Our data is never hand-edited, never filtered for resorts, never deleted. Sources: Copernicus Marine, NOAA ERDDAP (AFAI), Open-Meteo.

Measured accuracy across our Caribbean network (published backtests): next-day status is correct 86% of the time (mean AFAI error 0.036), 3-day status 80%. Nobody else in this market publishes their forecast accuracy.

Live Sargassum Map of Florida · Florida Sargassum Forecast — Next 7 Days, Beach by Beach · Florida Beaches Without Sargassum Today · Sargassum Season in Florida — 2026 Month-by-Month · Live map

Sargassum network: Martinique · Guadeloupe · Punta Cana · Cancún & Riviera Maya