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If you’re planning a beach vacation and are worried about the current seaweed conditions in Cancun and Riviera-Maya, this post has important information about seaweed season.
It also has the latest updates on the Cancun seaweed problem and details on sargassum seaweed in 2024 and the seaweed forecast for 2024.
Over the past 10 years, I’ve personally walked the beaches of Mexico’s Caribbean coast during seaweed season many times.
This report is from my trip to Cancun Riviera Maya in June 2024. The good news is that there is LESS seaweed than was forecast!!
While the quantity of seaweed coming to shore varies every year, certain beaches have more sargassum seaweed than others.
Here are my expert tips on planning the best beach vacation to Cancun and Riviera Maya in 2024!
It includes suggestions on how to find the best beaches for swimming, even during the height of seaweed season in Cancun.
Note: This is a recurring post updated with original photos, sargassum seaweed maps and information on seaweed conditions and the status of the current seaweed problem in Cancun, Playa del Carmen, Cozumel, Puerto Morelos, Isla Mujeres and Tulum.
Cancun Seaweed Season Right Now – A Quick Snapshot
June 2024: The forecast is by July 2024 onward, Cancun and the Mexican Caribbean coast will see a decrease in sargassum.
February 2024: The outlook for 2024 by University of South Florida suggested that there could be a major bloom of sargassum in 2024.
The university’s tracking system identified a large mat of sargassum seaweed in the Central Atlantic in February 2024.
The abundance was similar to conditions observed in 2017 and 2020, both of which preceded major seaweed blooms.
However seaweed on Cancun, Tulum, Playa del Carmen beaches in 2024 has been lower than predicted.
However, much depends on ocean and wind currents.
Read on to see original photos and learn which areas could be at risk.
Sargassum Seaweed Facts
What exactly is sargassum seaweed and why is it a problem?
Sargassum (also known as sargazo and sargasso) is a type of brown algae that generally lies in the open ocean in the Sargasso Sea in the North Atlantic.
Wrapped by ocean currents, this mat of seaweed floats on the surface of the water. It serves as a resting area and spawning ground for a vast array of life from eels to sea turtles.
While sargassum seaweed is a natural phenomenon that has been occurring for centuries, the influx of sargassum in recent years have been larger, thicker and more widespread.
Since 2011, blooms of sargassum have been appearing in the tropics sweeping up from South America through the Caribbean along the coast of Mexico and into the Gulf of Mexico and Florida.
The summer of 2018 witnessed the worst influx of sargassum brown algae in recent history. In 2022, the seaweed problem was equally as bad.
The quantity of the sargassum seaweed combined with differences in the composition of the seaweed itself, poses problems.
Large quantities of seaweed float on the surface of the water, wash up on beaches, trap marine life in the seaweed itself and use up the oxygen that fish need to breathe.
Various strategies — from raking it manually to using barriers to catch the sargassum before it reaches the shore — have been devised to try to deal with the unprecedented waves of seaweed that have engulfed regions of the Caribbean and Mexico in 2015, 2018, 2019, 2020, 2021 and 2022.
Is it Dangerous to Swim in Sargassum Seaweed?
Sargassum seaweed in itself doesn’t pose a problem, says Dr. Jeffrey Rapaport at Holy Name Hospital in Teaneck (Emeritus head of Dermatology). Instead, it’s what the seaweed harbours that can cause skin irritations and other risks.
The seaweed when floating at the top of hot, shallow waters, can start to play host to microbes and strains of bacteria the skin is not accustomed to coming in contact with. Also, you have to remember that fish normally use sargassum as a breeding grounds — leaving toxins and eggs in seaweed.
With freshwater as well as saltwater swimmers should watch out for the growth of Cyanobacteria (which can normally be seen changing the water’s colour to light green).
Cyanobacteria can release neurotoxins, which not only can affect the skin but can cause the death of neurons that control most of the muscles and movements in your body.
Another risk occurs when sargassum seaweed gathers in large quantities, washes up on beaches and begins to decompose. It releases hydrogen sulfide gas, or H2S, a colourless, poisonous gas with an unpleasant rotten-egg odor,
According to Eric Najarro, Administrator at the Dr. Otto Rodriguez San Pedro Polyclinic II in Belize, inhaling small doses of the gas can trigger irritation of the eyes, respiratory issues and nausea, especially among at-risk people such as those with asthma, the elderly, infants and pregnant women.
Certain animals, especially dogs, are also sensitive to the inhalation of hydrogen sulfide.
Another health risk to swimming with large quantities of sargassum seaweed is the potential for skin irritations and rashes.
So if you’re wondering if it’s safe to swim in sargassum seaweed, according to the experts I’ve consulted, it’s not advisable.
Note that red tide and sargassum seaweed are two different problems. A red tide is a bloom of algae that discolours coastal waters and releases dangerous toxins.
Eating shellfish or other seafood during an algal bloom is harmful to humans.
When is Seaweed Season in the Caribbean and Mexico?
In the Caribbean, seaweed season is generally May to October. The worst time for seaweed in Cancun, the Dominican Republic, Trinidad & Tobago and much of the Caribbean is during the summer months.
Looking for vacation ideas on Caribbean islands not affected by sargassum seaweed? 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.
However, the state of Quintana Roo has been working on strategies to cope with the seaweed problem.
In addition to aerial surveillance, they have issued contracts to hire companies to collect and dispose of the seaweed.
Seaweed Conditions in Cancun
The quantities of seaweed in Cancun and along the Caribbean coast will vary depending upon ocean currents, the size of the sargasso seaweed mat, seasonality, ocean currents and wind conditions.
If you want to avoid the worst time for seaweed in Cancun and reduce the likelihood of it ruining your vacation, it’s worth considering which beaches to choose for your vacation.
For example there can be large quantities of algae in Petempich Bay, in Puerto Morelos, Recodo Beach, in the municipality of Solidaridad (Playa del Carmen), as well as Punta Mosquitos on Holbox Island.
Yet the rest of the coast can be relatively clear.
Where in Cancun is There No Seaweed?
The best bet for beaches near Cancun with no seaweed is to head to the island of Isla Mujeres or to the leeward coast of Cozumel by ferry.
Beautiful Playa Norte (north beach) on Isla Mujeres is almost always clear of seaweed. Many of the hotels on the southwest coast of the island are also seaweed free.
We just returned from the newly-opened Impression Isla Mujeres by Secrets and loved its small private beach.
For more information on this all-inclusive, adults-only luxury resort, read our full review of Impression Isla Mujeres.
Another option is Playa Mujeres on the mainland north of Cancun.
Also on the mainland, Coral Beach stretches along the northern shores of what’s known as Punta Cancun or the most northerly point of the Cancun Hotel Zone.
This public beach occasionally gets hit by seaweed but usually it’s nothing major.
Next door at the Grand Fiesta Americana Coral Beach Cancun Resort & Spa, the private beach is often completely clear of sargassum. It features powder soft white sands and clear turquoise waters.
It is usually protected from seaweed by nearby Isla Mujeres. However wind and ocean currents can change and seaweed conditions at Grand Fiesta Americana Coral Beach Cancun can change quickly.
SCROLL DOWN TO SEE THE LATEST MAP OF SEAWEED CONDITIONS in Cancun
An advantage of Coral Beach is that the waters are calm and the entry is gradual with no steep drop-off. This makes it ideal for those who aren’t expert swimmers.
In my opinion, this is the best beach in Cancun for swimming. Beginner swimmers, small children and seniors will all enjoy swimming at this beautiful beach.
Best Cancun Beaches Without Seaweed – Playa Gaviotas and Playa Gaviotas Azul
One of the most popular public beaches in Cancun, Playa Gaviotas Azul is located at the northern tip of the hotel zone.
Beach access is between Coco Bongo and the Mandala Beach Club opposite Hooters via a narrow alleyway. Current seaweed conditions at Playa Gaviota Azul depend on the intensity of the ocean currents.
Most small clumps of seaweed on the sand are raked up by hotel staff. There is often very little sargassum seaweed floating offshore. But this is not always the case.
However wind and ocean currents can change and seaweed conditions can change quickly.
The major hotels on these beaches include the all-inclusive Krystal Cancun and the Hyatt Ziva Cancun at the point of the peninsula.
SCROLL DOWN TO SEE THE LATEST MAP OF SEAWEED CONDITIONS in CANCUN .
Best Cancun Beaches Without Seaweed – Playa Delfines / Dolphins Beach
This long, wide public beach at the southern end of the Hotel Zone is known as Playa Defines. It’s one of the most popular beaches in Cancun.
You’ll also see line-ups of people waiting to get a photo-op in front of the CANCUN sign.
The amount of seaweed on Playa Delfines varies considerably from week to week. See below for a photo of what it looked like in 2018.
However wind and ocean currents can change and seaweed conditions can change quickly.
If there is a lot of seaweed at Playa Delfines, a good option is to take a ferry to Isla Mujeres or Isa Cozumel. The leeward beaches on those islands almost always have no sargassum seaweed.
Check our list of the best all-inclusive resorts in Cancun Riviera-Maya.
Current Cancun Seaweed Conditions – Sargassum Forecasts for 2024
Seaweed forecasts by the experts have historically been quite accurate.
A report by Brigitta Ine van Tussenbroek, an ocean researcher from the Institute of Marine Sciences and Limnology at the National Autonomous University (UNAM) suggested large quantities of sargassum seaweed would return to Mexico’s Caribbean coast. Her report was quite accurate.
For seaweed season in 2024, the Sargassum Early Advisory System (SEAS) forecasting project showed several large floating masses of seaweed in the Atlantic between southern Africa and Brazil.
Whether it lands in Cancun, Chetumal, Tulum or the Riviera Maya depended much upon atmospheric conditions such as trade winds.
According to the University of South Florida’s Outlook of Sargassum blooms in the Caribbean Sea and Gulf of Mexico, based on offshore conditions, the seaweed forecast for 2024 suggested it would be another major Sargassum year.
The forecast is by July 2024, Cancun and the Mexican Caribbean coast will begin to see a decrease in Sargassum.
So it’s wise to keep a watch on seaweed conditions as landings of sargassum can change from day to day.
Current Seaweed Conditions in Tulum
How is the government dealing with the seaweed problem in Tulum, Playa del Carmen and Mexico’s Caribbean Coast?
When needed, the government of Quintana Roo issues an emergency declaration for the municipalities of Lázaro Cárdenas, Isla Mujeres, Benito Juárez, Puerto Morelos, Cozumel, Solidaridad, Tulum, Felipe Carrillo Puerto, Bacalar and Othón P. Blanco.
Declaring a State of Emergency enables local authorities to access funding to combat the volume of seaweed by removing accumulations and blocking it by various methods.
For seaweed season in 2024, analysis by the University of South Florida’s Outlook of Sargassum blooms in the Caribbean Sea and Gulf of Mexico suggested there could be a large amount of sargassum in 2024. But the reality is it’s been lower.
Tulum and Chetumal have often been hit the worst. But it’s important to note that from Tulum to Cancun seaweed conditions can change daily depending on tides and water temperature.
If sargassum conditions are bad on Tulum’s beaches, it’s worth trying the beach club at Caleta Tankah. The ocean here often has clear waters.
Playa del Carmen Seaweed in 2024
The popular resort town of Playa del Carmen has been experiencing a double whammy of challenges in recent years.
The main problems are the erosion of its beaches and the influx of sargassum seaweed along the coast. Seaweed in Playa del Carmen has a tendency to get trapped and decompose.
This makes it smell and release dangerous gases such as hydrogen sulfide gas, or H2S, a colourless, poisonous gas with an unpleasant rotten-egg odor,.
The seaweed season usually ends in October in Playa del Carmen.
But if you’re visiting Playa del Carmen in seaweed season, it’s possible to avoid seaweed problems in Playa del Carmen by staying at resorts that have created inland beaches.
Both the Xcaret Hotel Arte (adults-only) and Xcaret Hotel (family-friendly) have created several inland beaches so guests can avoid major sargassum mats.
Another all-inclusive resort in Playa del Carmen, Impression Moxché by Secrets, also created an artificial inland beach where you can enjoy soft sand and clear water in seaweed season.
Further south, a fantastic all-inclusive resort without seaweed is the Hard Rock Hotel Riviera Maya in Puerto Aventuras. It’s one of the best places to stay in seaweed season in Cancun and Riviera Maya.
Here, the inland beach has no seaweed because it’s protected by a rocky breakwater. But the tidal pools allow fresh seawater to enter. The water is clear enough to snorkel among tropical fish and has an added bonus of being quite calm.
Any sargassum seaweed that manages to sneak into the beach zone is promptly removed by staff. So there’s no seaweed to accumulate and rot.
Sargassum Forecast for Seaweed Season in Mexico in 2024
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.
June 2024:
Get the latest seaweed maps on the Red de Monitoreo del Sargazo Cancun Facebook Page .
July 2021:
March 2022
If you are planning a vacation during seaweed season (May to October), monitor current seaweed conditions throughout the Caribbean, Mexico and the Gulf of Mexico by consulting the following resources.
Sargassum Seaweed 2024 Forecast Resources
The resources will also help plan a beach vacation by providing forecasts on seaweed in 2024.
- Check the forecast at the University of South Florida’s Outlook of Sargassum blooms in the Caribbean Sea and Gulf of Mexico.
- Consult the Sargassum Early Advisory System (SEAS), a forecasting project based in Texas intended to help predict the movement of sargassum blooms. Originally created in 2013 to help with forecasting of the large Sargassum landings in Texas, by 2017 the SEAS project had expanded to provide forecasting for the Gulf Coast, Mexico, Grand Cayman, Jamaica, Haiti, Saba, the Dominican Republic, Puerto Rico and many other Caribbean islands. The SARGASSUM EARLY ADVISORY SYSTEM can forecast sargassum seaweed masses up to eight days in advance.
- Get seaweed maps, updates and a Seaweed Report from the Red de Monitoreo del Sargazo Cancun Facebook Page . This not-for-profit group is made up of engineers, biologists and other experts who are volunteering their time to provide monitoring expertise and services. They publish a map of areas affected by sargasso seaweed in Cancun, Riviera Maya, Cozumel and Tulum.
- Check Riviera Maya and Cancun Beach Webcams at Live Webcam to see live video frames updated every 15 seconds.
- Subscribe to get drone views and updates on sargazo seaweed in Playa del Carmen on the Doctry 360 YouTube channel.
- Consult our article on Caribbean Beaches Without Seaweed for vacation options in Mexico and several Caribbean islands.
- Subscribe to the free A Taste for Travel newsletter for updates on the best beaches, seaweed conditions and other travel tips!
- Consider resorts at beach destinations on Mexico’s Pacific Coast where there is no sargassum. Popular beach destinations include Huatulco, Puerto Escondido and Puerto Vallarta.
FAQs
Seaweed season in Cancun is May to October so if you are visiting during those months in 2024 you could encounter sargassum seaweed on the beaches and/or in the water. Based on the quantity of sargassum seaweed currently in the Atlantic, there could be a major seaweed problem in 2024 in the Caribbean Sea (affecting Cancun, Tulum and Playa del Carmen) depending on wind and ocean currents.
The amount of sargassum seaweed in Cancun varies by season and even daily. Generally the worst months for seaweed are July and August.
Tulum, Mexico has a history of receiving influxes of sargassum seaweed during seaweed season. Seaweed season is generally between May and October. Based on the large size of the sargassum mat currently in the Atlantic, experts forecast that Tulum could have a major seaweed problem in 2024, depending on ocean and wind currents.
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Louis
In Cancun now Westin L&mar beaches are fine but lots of seaweed. We are able to find times in the day and sections along the beach to swim. Not ideal but if your coming to get away and relax you will be able to. If your main purpose is to have daily ocean swims u will be disappointed We will be back next year which will be our 6 year in a row.
Michele Peterson
Thanks so much for the update! It’s great to hear you’re finding some clear patches without seaweed to enjoy!
Angela Novigrod
Dear Michele,
Wow, thanks for all this info. I never heard of it before. Unfortunetlly I planned a surprise 4 day visit to PDC mid June for hubby’s bday. We are staying at the Grand Hyatt. I’m wondering if it is worth cancelling and planning for another time. I can’t imagine the smell is any fun, gag. The map above says yellow, so not sure how bad this is on the gross meter. Is this part of PDC hit hard? If so does the cleaning efforts correct the issue or is it a summer long problem in this location? Thanks. We do have 1 day tour planned. Thanks for your help.
Michele Peterson
Hi Angela What a great birthday surprise! The beach south of the dock in PDC gets hit often but it’s hard to predict what the situation might be in June as so much depends on water and wind currents. If it’s bad you can always hop across to Cozumel as the leeward beaches on the island rarely ( if ever) have seaweed.Closer to your travel date you can also check the Red de Monitorio site on Facebook for the latest conditions.
TH
I’ve just booked our first family vacation in years for late June in Cancun, and I’m now terrified it’s going to be ruined by sargassum. I should have done more research on the issue before buying non-refundable airfare.
We were really looking forward to spending time on the beach and swimming in the ocean. Now I have to figure out how to salvage it. We are staying in the hotel zone, at JW Marriott.
Michele Peterson
Try not to worry! Sargassum isn’t on the beaches every day and many times is quite light. If it does arrive, then you could take a short ferry to Isla Mujeres or Cozumel where the west-facing beaches rarely receive any seaweed at all. There are also lots of things to do in Cancun such as visit Chichen Itza, go to a cenote or explore the Cancun museum.
Grant
As someone who lives in Cancun, has PR status, lives on the water, and regularly boats, I find this article pretty hard to swallow.
While some of it may be accurate, a lot of it is not, and that is truly unfortunate. I can’t help but think a lot of this was based on PR campaigns by American/European companies and news outlets to deter travel.
This type of information causes divides in people, culture, and society. I was recently invited to speak at an SEO conference in Las Vegas and was asked by two individuals if Cancun was safe. And frankly the only reason they think and ask this is because of articles like this. American/Canadians/Europeans are terrified of Mexico as a result of PR campaign gov/news, meanwhile, I live here and feel safer here than I ever did in the United States or Canada. Go figure.
In summary, this article isn’t really helping anyone.
Michele Peterson
If you live on the water in Cancun then you must surely be aware of the increasing problem with sargassum seaweed. It affects not only Mexico but many other Caribbean islands as I point out. I do agree that many people are inordinately afraid to travel to Mexico but believe this is due to highly publicized news of cartels, crime and gun violence rather than seaweed.I’ve personally seen more gun violence in Toronto Canada than I’ve ever seen in my 40 years of travels to Mexico.
Joel A****
We went to Sandos Playcar in Playa del Carmen June 2021 and sargassum wrecked our 2 week vacation. Red flags along the entire coast from Sandos Playacar up to 5th Street. We attempted to go snorkeling off the coast, but a person in our party got stung by jelly fish that were in the sargassum.
Also we and several others vacationing had all sorts of weird police, cartel, and drug dealer interactions that we never had before. There’s a desperation for tourism on the Riviera Maya since tourism took a blow during the pandemic and now this growing sargasso weed problem.
We have been going to Cancun and Playa del Carmen for 18 years, and will not waste our time and money going until this ecological (not climate change) problem is fixed.
Michele Peterson
Thanks for the update, Joel. So sorry you weren’t able to enjoy your vacation. Sadly, Playa del Carmen seems to be getting hit again this year.
Patricia Faithfull
Well, you are very pompous and inappropriately surecif yourself. This article is a god-send to those of us who want our tropical $$$ to be wisely allotted to a good time to avoid the hazards of sargasm.
Regarding safety, having been shot at (no joke) by an American having road rage with our Uber driver, I also can say the US is a he’ll hole of violence. Mexico is safer than the US, but what countries aren’t, lol?
This post should be deleted from this informative and useful blog.. Michelle, just do it. This guy is clearly a self-important hater to be using his time to troll; what self respecting person doesn’t just MOVE ON if they don’t find what they want. He was likely trying to get your attention to ride your successful coat-tail as a “local source”. But I truly HATE to see bullies on social media.
Michele Peterson
Many thanks for your support and feedback Patricia. I’m really happy you’ve found the information in this post to be helpful. I do try to provide honest and current information to the best of my ability using my own onsite observations and those of local contacts!
Aymy
Great update! I hope in 2021,the sargazo situacion will be better!
https://soymujerradiante.com
Sophie Fairmont
Hi,
I am wondering what the red tide will be like from the 4-9th of January 2021. My mom and I are planning traveling. Also wondering if it is COVID-19 safe.
Michele Peterson
Hi Sophie Red tide is very different than sargasso seaweed and January is well outside of seaweed season so it’s very unlikely you’ll see an influx of sargasso seaweed. You can see the latest statistics on COVID-19 in Cancun at this link https://qroo.gob.mx/sesa/nuevo-coronavirus-covid-19 and I recommend you check with your hotel directly about their safety standards and protocols. I hope that helps!
Carmen Berg
Thank you so much for sharing this article! It is so helpful to see and understand the reason of this phenomenon. We are planning a family reunion for July 2020 in Playa del Carmen. However, by reading this article I learned of other options to stay at. I will keep a close look at the forecast and accumulation.
Thank you!
Michele Peterson
Great to hear you found it helpful, Carmen!
Jean
Are you still traveling to Cancun in July? Or have your altered your plans due to COVID-19?
Deborah White
What is the forecast for April 3, 2020 for Riviera Maya? We will be staying at Grand Velas.
Michele Peterson
It’s very difficult to predict seaweed conditions so far in advance. But generally speaking April isn’t the height of seaweed season so that’s a promising sign. It’s worth checking on the resources I’ve listed and register for updates from the Grupo de Red de Minitoreo de Cancun on Facebook ( https://www.facebook.com/groups/2272972109391283/) as they publish maps and forecasts for the coast of Mexico. Grand Velas is a beautiful resort with lots to do so even if you do get some seaweed it’s a lovely place to be.
Sara
Thank you for the information. We were there in June 2018 and, as other have said, The beaches are perky, full of the sea grass, with an offense of order. We’re hoping to return and fall of this year. Any advice?
Michele Peterson
Hi Sara…sorry to hear you had such a unpleasant experience last June! The good news is that generally the fall season sees less seaweed than summer. I was at Coral Beach in Cancun in late 2018 and there was no seaweed for the duration of my stay. It’s difficult to predict as much depends on winds and ocean currents as well as where on the coast you are headed. I’ll post any updates as I get them so please do check back!
Luis
We’ve been at Catalonia Playa Maroma this week and the water looks like sewage. We had six days of brownish water which we were able to swim in and enjoy, but it was really bad today. Yikes. Hope they can get it under control. It’s beautiful here.
Adam
what the the current seaweed situation and erosion in Playa del Carmen? We going down March 2019. Thanks
Michele Peterson
It really depends where in Playa del Carmen you are going…there is a fair bit of beach erosion in front of some resorts which makes it hard to dodge seaweed when there’s an influx. Today there is some mucky accumulation while other stretches are fairly clear. That having been said, New Year’s Day in front of Kool Beach Club and Mamitas there was quite a bit of seaweed but not overwhelming. People were still swimming in the sea. It’s hard to predict the situation in March….but you can check out the current conditions via a beach cam at this link https://www.playadelcarmen.com/information/webcam
Carole Terwilliger Meyers
Who knew there was so much to learn about seaweed? I did see a lot of it in Barbados in late October. The hotel employees were busy every day raking it up and burying it.
Irene S. Levine
You’ve created an excellent resource for visitors to Cancun. I also learned a lot about sargassum.
Debbra Dunning Brouillette
Thanks for the information, Michelle! I know red tide has been a big problem on the Gulf Coast of Florida this year, so whenever we are traveling to a coastal area, it’s a good idea to check the current local conditions…
Doreen Pendgracs
Thx so much for the information. I had no idea there has been a seaweed problem in the Cancun area. It is interesting to know how many changes we are facing as a consequence of climate change.
jane
SO helpful! For people who are planning a Cancun escape this is so good to know.
Michele Peterson
Thanks Jane! I hope it’s handy for anyone planning a trip to this beautiful part of Mexico.