Florida's seaweed season typically runs from April until October, peaking in June and July. The seaweed comes in waves, depending on currents and wind direction. The seaweed itself is not harmful to humans, but decaying sargassum on beaches releases hydrogen sulfide that can impact people with breathing issues.
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USF reports it remains difficult to predict exact timing and location for individual beaching events but substantial amounts of the seaweed are expected in May in both the Caribbean Sea and Gulf of Mexico. June is forecast to be the likely peak of the 2023 season, but impacts are expected to continue into July.
Sargassum seaweed washing up on Florida beaches has ebbed to levels normally seen in early fall, even below normal in some areas. The once-anticipated 5,000-mile-wide bog in the Atlantic and Caribbean has rapidly — and mysteriously — disappeared.
The huge blob of seaweed headed for Florida has shrunk by 75% Beachgoers walk past seaweed that washed ashore on March 16, 2023 in Fort Lauderdale, Florida. Florida vacations are back on, sans stinky seaweed.
USF reports it remains difficult to predict exact timing and location for individual beaching events but substantial amounts of the seaweed are expected in May in both the Caribbean Sea and Gulf of Mexico. June is forecast to be the likely peak of the 2023 season, but impacts are expected to continue into July.
However due to ocean currents, the amount of seaweed landing on beaches in the Caribbean and the Gulf of Mexico in June and July 2023 was lower than expected. There's more good news! The sargassum seaweed forecast for September 2023 is minimal seaweed in the Caribbean Sea.
Sargassum season in the Mexican Caribbean typically runs from May through October, with July and August generally being the worst months for its arrival.
Florida's seaweed season typically runs from April until October, peaking in June and July. The seaweed comes in waves, depending on currents and wind direction.
There is a large amount in the lower Florida Keys and it will travel up the east coast. Once in the Gulf of Mexico, sargassum can get entrained in the loop current which runs through the Florida straits and becomes the north-flowing Gulf Stream current.
Sargassum is type of brown seaweed that drifts on the ocean surface accumulating along beaches and coastlines throughout the Caribbean, Mexico, Texas and Florida, including Miami-Dade County annually from March to October.
While exposed eastern shores are most likely to get hit by surges of sargassum, some beaches in Mexico have no sargassum. This includes Playa Norte on Isla Mujeres, Quintana Roo and Cozumel's western shore. They're generally seaweed-free. However, much depends on winds and ocean currents.
7 September 2023 Update: The Turks and Caicos is experiencing medium levels of sargassum at this time. Grace Bay, Leeward Beach, Sapodilla Bay, Taylor Bay, and the Bight Beach remain largely free of sargassum. Sargassum that washed onshore in late August has largely dissipated.
As summer is now in full swing, however, scientists with the University of South Florida Optical Oceanography Lab found a drop in the amount of sargassum blooms. Sargassum seaweed on a Fort Lauderdale beach. May 2023. They noted that the amount of seaweed dropped by about 9 million metric tons between May and June.
Sargassum is at its worst between April and August, peaking in July and August, although this year saw the seaweed arrive early, with some beaches being hit heavily in March. What is this?
While exposed eastern shores are most likely to get hit by surges of sargassum, some beaches in Mexico have no sargassum. This includes Playa Norte on Isla Mujeres, Quintana Roo and Cozumel's western shore. They're generally seaweed-free.
There is currently no sargassum on Destin-Fort Walton beaches, but we are making preparations if seaweed accumulations reach excessive levels. As you are probably aware, algae and seagrasses are naturally occurring in the marine environment worldwide.
It will most likely impact south Florida, but researchers do not believe the impact will be as large along Florida panhandle beaches. They will continue to monitor and report on the movement of this mass of seaweed over the course of the summer.