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Miami and the Florida Keys · NOAA satellite data of Mon 5 Oct 2026
Sargassum in Miami and the Florida Keys tomorrow
Medium at 3 beaches, low at 5 beaches. Medium or high: South Beach, Smathers Beach and Higgs Beach.
Best tomorrow with a low seaweed risk: Sunny Isles Beach — calm water, quiet crowd.
Beach by beach
| Beach | Faces | Sargassum | Sea tomorrow |
|---|---|---|---|
| Higgs Beach Florida Keys | S | Medium | Calm |
| Smathers Beach Florida Keys | S | Medium | Calm |
| South Beach Florida Keys | S | Medium | Calm |
| Crandon Park Beach Miami and Fort Lauderdale | E | Low | Calm |
| Fort Lauderdale Beach Miami and Fort Lauderdale | E | Low | Calm |
| Haulover Beach Miami and Fort Lauderdale | ESE | Low | Calm |
| Miami Beach Miami and Fort Lauderdale | ESE | Low | Calm |
| Sunny Isles Beach Miami and Fort Lauderdale | E | Low | Calm |
Sargassum: NOAA's class for the stretch of coast nearest the beach, data of Mon 5 Oct 2026. Sea: our rating from the wind and wave forecast.
Is there seaweed in Miami and the Florida Keys tomorrow?
Tomorrow, NOAA's satellite risk for Miami and the Florida Keys is medium at 3 beaches, low at 5 beaches (data of Mon 5 Oct 2026). Miami Beach, Key Biscayne and Fort Lauderdale face east onto the open Atlantic: small surf on an east wind, rip currents after a front, and in summer, sargassum. The Keys sit behind the Florida Reef, so their few sandy beaches, like Bahia Honda and Smathers, rarely get real waves; their worry is seaweed and, on a north wind, murky water on the Gulf side.
The last two weeks
Beaches per risk level, per NOAA satellite file.
| Day | Low | Medium | High | Worst |
|---|---|---|---|---|
| Mon 5 Oct | 5 | 3 | Medium | |
| Sun 4 Oct | 5 | 3 | Medium | |
| Sat 3 Oct | 6 | 2 | High | |
| Fri 2 Oct | 3 | 5 | High | |
| Thu 1 Oct | 3 | 5 | High | |
| Wed 30 Sep | 3 | 5 | High | |
| Tue 29 Sep | 3 | 5 | High | |
| Mon 28 Sep | 3 | 5 | High | |
| Sun 27 Sep | 3 | 5 | High | |
| Sat 26 Sep | 3 | 5 | High | |
| Fri 25 Sep | 3 | 5 | High | |
| Thu 24 Sep | 3 | 5 | High | |
| Wed 23 Sep | 3 | 5 | High | |
| Tue 22 Sep | 8 | High |
How to read NOAA's risk
NOAA's Sargassum Inundation Risk is an experimental product of NOAA/AOML, NOAA CoastWatch/OceanWatch and the University of South Florida. Every day it compares the floating seaweed that satellites see within 50–100 km of each stretch of coast with the weeks before, and gives the stretch one of four classes. We show them as three words:
- Low (NOAA: low): little or no seaweed near this coast.
- Medium (NOAA: warning or medium): seaweed at sea nearby; some may wash up, depending on wind and current.
- High (NOAA: high): a lot of seaweed nearby; expect it on the beach and brown water at the edge.
- No data: clouds or no coast segment near the beach; we do not guess.
What it cannot tell you: whether a hotel cleaned its beach this morning, or a raft that arrived overnight. It looks at stretches of coast of a few kilometres, not at one beach. Seaweed on the beach is not dangerous to touch, but rotting piles give off hydrogen sulphide (the smell of rotten eggs), which can bother people with asthma.
Which beach in Miami and the Florida Keys tomorrow · Sargassum in other places · Is the water clean?