Is seaweed a problem in Cancun in November?

In the Caribbean, seaweed season is generally May to October. The worst time for seaweed in Cancun, the Dominican Republic and much of the Caribbean is during the summer months.



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In November and December, as the climate “cools” to a still-pleasant average temperature of between 75-84°F, the presence of the seaweed is far lower – with most beaches free of the noxious nuisance completely.

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Since 2011, 2023 still ranks in the top half of the worst sargassum seaweed seasons. With the latest data, USF researchers say in June, sargassum will likely decrease in the Gulf of Mexico, meaning beachgoers may not have such a smelly experience. The USF lab forecasts the decrease to continue through August.

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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.

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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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  • 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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When's The Best Time To Visit Cancun? Although seaweed does tail off by August, as a general rule, Mexico's coast is usually completely cleared only by November, when the water finally cools down in the Northern Hemisphere and algae reproduction – including sargassum – slows down.

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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.

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While the seaweed shows up from the Gulf of Mexico around June each year, it always piles up the most between July and August. If you're looking to schedule your trip to Key West when it's least likely to be consumed with seaweed, you'll want to make plans to arrive between October and May.

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Weather in Cancun in November starts to mellow out, making November one of the best months of the year to visit. It isn't as rainy as the other fall and summer months, you'll find inexpensive flights and hotel accommodation, light crowds and beautiful Cancun weather to set the stage for a fun and relaxing holiday.

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Avoid visiting during Christmas, New Year's, and especially Spring Break as these are the most hectic travel periods for Cancun. If possible, avoid Mexico's hurricane season, which stretches from late-July to late-October.

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Want to know about the water temperature in Cancun in November? The Caribbean Sea is warm all year long, so you can comfortably swim, snorkel and go scuba diving in Cancun in November. Note: Ocean temperatures between 77°F (25°C) and 84°F (29°C) are regarded as warm.

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Sargassum season in the Mexican Caribbean typically runs from May through October, with July and August generally being the worst months for its arrival.

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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.

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Popular resort hubs, including Playa del Carmen and Tulum, have ramped up efforts to deter sargassum from affecting travelers. What is this? Both destinations have set up temporary barriers and hired more cleaners in an effort to attract more travelers.

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Escape the 'blobs:' These beaches in Cancun have little to no seaweed
  • Isla Contoy. “Spanning just five miles long, the island's pristine white sand, untouched by sargassum, stands as its undeniable centerpiece, drawing visitors in with its sheer beauty. ...
  • Playa Tortugas. ...
  • Isla Mujeres Playa Centro. ...
  • Isla Mujeres - Punta Sur.


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From April to September, the Caribbean sea's turquoise waters change hues due to the presence of seaweed. If you want to dip into sargassum-free beaches, the best season is from October to May.

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Check out our Guide to Caribbean Beaches without Sargassum Seaweed. The seaweed season in Cancun is generally over by the end of October. However, some towns such as Puerto Morelos sometimes continue to receive sargassum seaweed past that date. Erosion of the beaches in Playa del Carmen is also an issue.

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