Why is the water so blue in Cancun?

The water appears blue due to the fact that the ocean absorbs all wavelengths of light very well, except for the short wavelengths of blue. The fact that tropical oceans are clear means that they are lacking in suspended sediment and plankton.



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Originally Answered: Why is the water so blue in Cancun? It is likely due to low phytoplankton growth in water. Phytoplankton are algae of which there are numerous types including chlorophyta (green algae), rhodophyta (red algae), and phaephyta (brown algae).

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Cancun is recognized worldwide for its spectacular beaches of fine white sand, its fascinating turquoise blue sea and unparalleled weather, as well as excellent air and land connectivity, and a first-class hotel infrastructure that places it as one of the best destinations for tourists throughout the world thanks to ...

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Seaweed and algae in the ocean´s floor, can darken the color of the water or give a green aspect to it. Plankton, algae and other organisms transform blue color into green. Also if there is seaweed floating light cannot penetrate the surface and shed light deep enough.

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This MODIS image of blue water in the Caribbean Sea looks blue because the sunlight is scattered by the water molecules. Near the Bahama Islands, the lighter aqua colors are shallow water where the sunlight is reflecting off of the sand and reefs near the surface.

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The Weddell Sea has been claimed by scientists to have the clearest waters of any ocean in the world. Described by a historian as “the most wretched and dismal region on earth”, due to the flash freezes that caught Shackleton's ship, its clarity is only belied by the sheer depth of the ocean below.

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Devil's Bay, Virgin Gorda, British Virgin Islands
  • Buck Island, U.S. Virgin Islands.
  • Grand Case Beach, St. Maarten.
  • Grand Case Beach, St. Maarten.
  • Honeymoon Beach in St. John, U.S. Virgin Islands.
  • Ffryes Beach, Antigua.
  • Blue Bay Beach, Curaçao.
  • Blue Bay Beach, Curaçao.
  • Grand Anse Beach, Grenada.


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Playa Maroma (Maroma Beach), located at around km 55 of the Cancun-Chetumal Highway in the Riviera Maya, is considered by many to be one of the best beaches in the world due to its size, the incredible blue color of the water and amazing snorkeling right off shore.

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The short answer is no. Tap water in Cancun is not recommended for drinking, even for locals.

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As you can tell by now, many factors come into play to create the perfect turquoise color that defines the Caribbean. We are lucky to enjoy mother nature showing off with the beautiful intense tones that Cancun gives to everyone who visits.

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The reason why the Cancun sand is always cool is because the color reflects the sun as opposed to absorbing it. In addition, 70% of this sand is composed of defected pieces of coral expelled by Parrotfish.

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To the OP, in all seriousness, the water in Cancun is fine for bathing/showering; I wouldn't recommend you drink it though. It's not that the water is inherently unsafe it's that it almost certainly has minerals dissolved in it that your body isn't used to and may cause intestinal upset.

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Cancun is recognized worldwide for its spectacular beaches of fine white sand, its fascinating turquoise blue sea and unparalleled weather, as well as excellent air and land connectivity, and a first-class hotel infrastructure that places it as one of the best destinations for tourists throughout the world thanks to ...

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Best time to visit Cancun for swimming snorkeling and diving The drier months of November through May provide the best visibility, especially in January and March. Though it's possible to snorkel with whale sharks from June to September, the visibility is best in June.

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It is in Puerto Bahía Balandra (Balandra Bay), a sheltered area in the Gulf of California just across from Isla Espiritu Santo, a UNESCO World Heritage Site that has what many consider the bluest water in Mexico.

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We get a lot of questions here about jellyfish, the favorite season of that critters is during the trade winds of March - June. However we do not get many jellyfish and this would be a snorkeler's or diver's least concern. Your chances of getting a serious sting would be 1:5000 or more.

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Seven Mile Beach, Grand Cayman One of the best-known features of Grand Cayman, Seven Mile Beach is a long crescent of coral sand lapped by clear turquoise water. Little wonder that the beach is constantly voted one of the finest in the Caribbean.

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The Maldives This island nation, located between the Indian and Arabian seas, is known for luxuriously appointed resorts with bungalows set over dazzling blue waters with talcum-soft white sand beaches.

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