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What time of year is seaweed bad in Cancun?

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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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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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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The best time to go to Cancun is the shoulder months of April, May, November, and the beginning of December. The best weather in Cancun is between December and April. Rainy season in Cancun runs from May to October, which is the best time to visit Cancun on a budget.

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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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Low season in Cancun The low season is from June to October, with September and October being the least crowded. Tourists won't surround you, and you'll get the best prices.

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What time of year is seaweed bad in Cancun? The amount of sargassum seaweed in Cancun varies by season and even daily. Generally the worst months for seaweed are July and August.

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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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  • 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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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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You can swim in the water if there's sargassum and people do, but I have seen some reports of sea lice associated with sargassum in water with big mats of it floating around,” he says, referring to small jellyfish larvae, which can cause the skin to erupt in a red, itchy rash.

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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 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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June is the hottest month in Cancun with an average temperature of 28°C (82°F) and the coldest is January at 23°C (73°F) with the most daily sunshine hours at 11 in August. The wettest month is September with an average of 270mm of rain.

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How to get the best deal on all-inclusive resort in Mexico? Visiting Mexico during the off months (April, May, October, and November) can save you a pretty penny, while booking several months in advance can also keep more dollars in your wallet.

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