Is there seaweed season in Cancun in November?

From October to May to avoid seaweed 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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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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In Mexico, sargassum seaweed season is generally between May and October each year. If you travel to the Caribbean coast of Mexico outside of that time period you can generally avoid large mats of seaweed on the beaches. Cancun to Tulum seaweed map in March 2022. Credit: Red de Monitoreo del Sargazo de Quintana Roo.

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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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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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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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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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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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  • 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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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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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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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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From October to May to avoid seaweed If you want to dip into sargassum-free beaches, the best season is from October to May.

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Photo: Marama Beach has the clearest water in Mexico Perfection at Palifitos Paradise!

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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.

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The average water temperature in Tulum in November is 82°F (28°C). When it comes to the water temperature in Tulum in November — it should feel warm and pleasant. The Caribbean Sea is warm all year long, so you can comfortably swim, snorkel and go scuba diving in Tulum in November.

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If you're considering a vacation in Tulum and you're wondering about the Tulum seaweed problem, let me reassure you that it isn't a guaranteed problem; the seaweed doesn't cover every single beach all the time and even when the beaches are seaweed-y, there are plenty of great options for activities in Tulum.

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Central Mexico, including cities like Mexico City, Guadalajara, and Morelia, experiences pleasant and mild weather in November. Days are usually warm, with temperatures ranging from the high 60s to mid-70s Fahrenheit (20-24°C), while nights can be cooler, dropping into the 50s Fahrenheit (10-15°C).

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What Is Sargassum? Sargassum seaweed is a type of macroalgae that forms over the Atlantic Ocean each year in large quantities. The foul-smelling but harmless seaweed is a perennial issue for Caribbean destinations like Cancun, which see huge quantities of the macroalgae wash up on their shores yearly.

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How Does Isla Mujeres Avoid The Sargassum? One of Isla Mujeres's main reasons it can keep the sargassum at bay is due to its unique location. The island is located in a spot where ocean currents aren't favorable for sargassum, which means the seaweed is then less likely to wash up on its shores.

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