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Why is there so much seaweed in Miami Beach?

Fertilizer runoff and sewage dumped into the ocean have fed sargassum more nutrients, while climate change has warmed ocean waters and given the seaweed a more hospitable environment in which to grow.



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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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Many art deco style lifeguard towers line the shore of Miami's South Beach, which, in addition to being a feast for the eyes, house Miami Beach Patrol Lifeguard staff who will ensure you have a safe swim.

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Calm, crystal-clear water and soft, white sand have always beckoned swimmers and sunbathers to the beaches in Greater Miami & Miami Beach. There's plenty of space for you and your crew to experience a day of carefree bliss along the shore in a way that's just your style.

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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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Organic and inorganic testing is performed annually and the results are provided to the City for review. All testing shows the water being received from WASD meets or exceeds federal and state drinking water standards.

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? Avoid touching or swimming near seaweed to avoid stinging by organisms that live in it. ? Use gloves if you must handle seaweed. ? Stay away from the beach if you experience irritation or breathing problems from hydrogen sulfide—at least until symptoms go away. ? Close windows and doors if you live near the beach.

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  • Grand Anse in St. ...
  • Morne Rouge Beach on Grenada. ...
  • Grace Bay Beach in Providenciales, Turks and Caicos. ...
  • Palm Beach in Aruba, Dutch Caribbean. ...
  • Playa Porto Mari on Curacao, Dutch Caribbean. ...
  • Bloody Bay and Long Bay Beaches in Negril, Jamaica. ...
  • Beaches in Antigua & Barbuda.


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The sargassum seaweed that is washing up in mass amounts on South Florida beaches is carried from off the coast of Brazil by oceanic currents, finally arriving via the Gulf Stream to be blown ashore by the prevailing onshore winds.

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While the 2023 sargassum bloom isn't as large as originally expected, it will still be a major year for the algae and the lab expected it to continue increasing in the Caribbean Sea and Gulf of Mexico in March. It is expected to travel west from the Caribbean Sea and become a hazard on some beaches in Florida.

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2023 is shaping up to be a banner year for sargassum, a type of brown macroalgae now starting to wash up on beaches across the Caribbean. The thick dead tangled heaps of seaweed stink like rotten eggs and could cost many millions in holiday revenues this summer.

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Miami. Miami is a beautiful boating location for gin-clear water but it's not as prevalent as you'd think. The best locations to enjoy this Florida gin-clear water are Haulover Sandbar and the numerous cuts and sandbars south of Key Biscayne.

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