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What time of year is worst for seaweed in Cancun?

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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Seaweed season in Cancun is May to October so if you are visiting during those months in 2023 you could encounter sargassum seaweed on the beaches and/or in the water.

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If you dream of swimming in the Caribbean Sea, go to Cancun between November and March as it is out of seaweed season, but the sea is warmer between July and October (average temperature 28°C – 83°F).

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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 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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  • Grand Anse in St. ...
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  • Grace Bay Beach in Providenciales, Turks and Caicos. ...
  • Palm Beach in Aruba, Dutch Caribbean. ...
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  • Bloody Bay and Long Bay Beaches in Negril, Jamaica. ...
  • Beaches in Antigua & Barbuda.


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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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From October to May to avoid seaweed If you want to dip into sargassum-free beaches, the best season is from October to May. Fun Fact: Some resorts like Seadust Cancun have made efforts to keep the seaweed from arriving at the shore by implementing a marine-life-friendly barrier.

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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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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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The best time to visit Cancún is from December to April during the peak season. Even though the crowds are heavier, you'll experience near-perfect weather and find some of the cheapest flight and room rates for a winter getaway at the beach.

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Grace Bay Beach in Providenciales, Turks and Caicos Grace Bay in Providenciales, Turks and Caicos is definitely a destination to consider if you're looking for Caribbean beach without seaweed for a family, couples or group vacation.

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If you don't have any open wounds, you should be OK to swim in oceans with sargassum, since that environment is moving saltwater instead of brackish water, he added. But if you see a clump go by, stay away from it.

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In general, the coast of the Riviera Maya is affected about equally, but it tends to be worse the farther south you go. Right now, the amount of sargassum at most Riviera Maya beaches is little to none as the sargassum season is coming to the end. You can see the daily reports on here...

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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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? April – October are the hottest months on the Yucatán Peninsula. November – January are the coolest months. Tulum's high season coincides with the cooler period. ? The worst months for seaweed washing up in Tulum and the rest of the Caribbean Coast are considered to be June, July and August.

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Worst Time to Visit Cancun
  • If you're seeking perfect weather, the worst time to visit Cancun is in September and October. ...
  • If you're seeking cheap prices, the worst time to visit Cancun is December to April. ...
  • If you're seeking smaller crowds, the worst time to visit Cancun is mid-March to April.


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The Pacific Coast is sargassum-free, and in parts of Mexico's Caribbean Coast, the impact varies. For example, the resorts of Cozumel and Isla Mujeres have shown small to virtually no signs of sargassum this year.

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

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The beaches in Playa del Carmen experience a seasonal seaweed influx that can change throughout the year. While efforts are being made to address the situation, visitors should know that the seaweed may impact their beach experience.

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Top Tip: Punta Esmeralda is a curved bay sheltered from the open sea, and thus receives less sargassum seaweed than other beaches in Playa del Carmen. If you're visiting during the sargassum season, which runs roughly from April to August, this might be the best place to swim in seaweed-free water.

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