Florida Sargassum Forecast — Next 7 Days, Beach by Beach
Updated September 8, 2026 from Copernicus satellite data — refreshed 4× per day.
Most sargassum information for Florida comes as a statewide bulletin or a monthly outlook — accurate in broad strokes, useless for deciding where to swim on Saturday. This forecast works at the level that actually matters: the individual beach. We track 12 of them, from Key West up to Daytona and across to Clearwater, and run a separate 7-day projection for each, because their realities diverge wildly — the Keys can be knee-deep in seaweed while Clearwater stays spotless. The model ingests fresh Copernicus satellite imagery daily, locates the mats drifting offshore, and projects what reaches which sand and when. You get a day-by-day outlook per beach, updated every morning. Check it before you commit to a beach weekend; the ocean does not read monthly bulletins.
7-day forecast — Florida
- Miami Beach (Clean, Beach Score 60/100) — Tue: Clean · Wed: Clean
- South Beach (Clean, Beach Score 60/100) — Tue: Clean · Wed: Clean
- Fort Lauderdale Beach (Clean, Beach Score 64/100) — Tue: Clean · Wed: Clean
- Palm Beach (Clean, Beach Score 63/100) — Tue: Clean · Wed: Clean
- Jupiter Beach (Clean, Beach Score 63/100) — Tue: Clean · Wed: Clean
- Key West (Smathers) (Clean, Beach Score 64/100) — Tue: Clean · Wed: Clean
- Key Largo (Clean, Beach Score 64/100) — Tue: Clean · Wed: Clean
- Islamorada (Clean, Beach Score 61/100) — Tue: Clean · Wed: Clean
- Marathon (Sombrero) (Clean, Beach Score 61/100) — Tue: Clean · Wed: Clean
- Cocoa Beach (Clean, Beach Score 64/100) — Tue: Clean · Wed: Clean
- Daytona Beach (Clean, Beach Score 52/100) — Tue: Clean · Wed: Clean
- Clearwater Beach (Clean, Beach Score 61/100) — Tue: Clean · Wed: Clean
- Hollywood Beach (Clean, Beach Score 64/100) — Tue: Clean · Wed: Clean
- Haulover Beach (Clean, Beach Score 64/100) — Tue: Clean · Wed: Clean
- Sunny Isles Beach (Clean, Beach Score 64/100) — Tue: Clean · Wed: Clean
- Deerfield Beach (Clean, Beach Score 66/100) — Tue: Clean · Wed: Clean
- Pompano Beach (Clean, Beach Score 54/100) — Tue: Clean · Wed: Clean
- Delray Beach (Clean, Beach Score 66/100) — Tue: Clean · Wed: Clean
- Crandon Park (Clean, Beach Score 60/100) — Tue: Clean · Wed: Clean
- Bahia Honda (Clean, Beach Score 61/100) — Tue: Clean · Wed: Clean
How our forecast works
Satellites detect floating sargassum through the AFAI spectral index — mats reflect near-infrared light in a way open water does not. We pull this imagery from Copernicus and NOAA four times a day, then project each detected mat forward along wind and current vectors; in Florida, the Gulf Stream does most of the steering. Beached seaweed decays on an exponential curve with a 3.5-day half-life unless new material lands. Each beach gets a daily score from clean to avoid, corrected by community reports when clouds block the view. Days 1–3 carry the most confidence, and the whole forecast recomputes daily.
Live Sargassum Map of Florida · Florida Beaches Without Sargassum Today · Sargassum Season in Florida — 2026 Month-by-Month · Best beaches without sargassum · Sargassum this week · Methodology & accuracy · For hotels · Press & media · Clearwater Beach Sargassum Today · Miami Beach Seaweed Map — Today's Sargassum · Key West Sargassum Today — Live, Beach by Beach · Is There Sargassum in Miami Today? · Sargassum in Fort Lauderdale & Sunny Isles Today · Daytona Beach Sargassum Today: Live Satellite · Sunny Isles Beach Sargassum Today: Live Map · Is Sargassum Dangerous in Florida? What to Know · Pompano Beach Sargassum Today · Boca Raton Sargassum Today · Delray Beach Sargassum Today · Fort Myers Sargassum Today: Live Beach Score · Naples FL Sargassum Today: Live Satellite Beach · Hollywood Beach Sargassum Today: Live Map · Live map
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