South Beach seaweed today
Live sargassum report.
SEAWEED RIGHT NOW
Moderate
Latest report: moderate sargassum.
Patches on the sand and mats drifting in the water. Expect to pick your spot, and a low-tide smell up close.
No red tide effects expected.
Updated Jun 15
What this means on the sand
Sargassum is a floating brown seaweed that drifts ashore from the Atlantic in pulses, heaviest from roughly May through August. Light levels mean scattered clumps you can walk around; heavy levels mean thick mats along the waterline, a sulfur smell as it breaks down, and tougher entry into the water.
ShoreScore folds this reading into South Beach's overall 0-100 score alongside live weather, surf, UV, and official water-quality testing, so one number tells you whether it's worth the trip.
Seaweed at nearby beaches
Mid-BeachVirginia KeyCrandon Park (North)Key Biscayne / Crandon ParkSurfsideAll beaches
Also for South Beach: today's water quality and bacteria test →
Source: NOAA, refreshed daily. Informational only, not for safety decisions.