Seaweed Season Cancun: Complete Guide

If you’re planning a trip to Cancun, one thing you should be aware of is the seaweed season. During certain times of the year, seaweed, specifically sargassum, can be an issue along the beaches of Cancun and the surrounding Riviera Maya. While the amount and severity of seaweed can vary from year to year and even day to day, it’s always a good idea to be informed about the current conditions and how to navigate them during your trip. In this guide, we’ll provide you with all the information you need to know about seaweed season in Cancun and how to enjoy the beaches while minimizing any potential seaweed interference.

Seaweed Season Cancun

Seaweed season in Cancun takes place from May to September or October. During this time, large amounts of seaweed are washed up on the shores of the city. This can be a nuisance for locals and tourists alike, as it can make the beach less enjoyable and cause unpleasant smells.

The seaweed season is caused by a combination of factors. First, there is a natural phenomenon called Sargassum blooming. This is when algae in the Sargasso Sea release billions of tiny floating plants called Sargassum into the water. These plants then travel to other parts of the world, including the Caribbean.

Seaweed Season Cancun

Second, there is a change in wind patterns during the summer months. The winds blowing across the Atlantic Ocean are typically weaker during this time of year, which means that the Sargassum has an easier time making its way to shore.

Third, there is an increase in temperature and humidity during the seaweed season. This creates ideal conditions for the Sargassum to grow and thrive.

Fourth, there is a decrease in ocean circulation during seaweed season. This occurs because the Gulf Stream slows down as it approaches land. As a result, more seaweed is able to accumulate along the coastline.

All of these factors come together to create what we know as the seaweed season in Cancun. While it can be inconvenient and unpleasant, it is ultimately a natural phenomenon that happens every year.

How long does the seaweed season last in Cancun?

Seaweed season in Cancun generally lasts from May to October, with the peak months being June and July. However, there is no set start or end date for seaweed season, as it can vary somewhat from year to year.

During seaweed season, the waters of Cancun’s beaches can become murky and filled with large amounts of seaweed. This can make swimming and other water activities difficult. In addition, seaweed can often have a strong odor. 

Seaweed Season Cancun

If you’re planning to visit Cancun during seaweed season, there are a few things you should know in order to make the most of your trip. First, be sure to check the local weather forecast before heading to the beach. If it looks like there is a chance of rain, it’s best to avoid the beach as heavy rains can cause even more seaweed to wash up on shore.

Second, don’t forget to pack some insect repellent. The increased amount of seaweed on the beach can attract bugs, so you’ll want to be prepared.

Finally, keep in mind that not all of Cancun’s beaches are affected by seaweed season. If you’re looking for a place to escape the seaweed, head to one of Cancun’s many offshore islands. These islands are typically not affected by seaweed season and offer beautiful clear waters year-round.

seaweed in cancun in december

December is a great time to visit Cancun as the weather is typically warm and sunny with an average temperature of around 80°F (27°C). As for seaweed, it’s difficult to predict exactly how much seaweed you may encounter as it can vary from year to year and even day to day. However, historically, seaweed tends to be less of an issue in the winter months.

That being said, it’s always a good idea to check with local authorities or your hotel or resort to see if there have been any recent seaweed issues. Additionally, you can monitor seaweed conditions through the Cancun Sargassum Monitoring Network, which provides daily updates on seaweed conditions in the area.

If you do encounter seaweed during your visit, be sure to follow any instructions or guidelines from local authorities on how to safely navigate the seaweed-covered beaches.

Riviera maya seaweed season

Seaweed, specifically sargassum, can be an issue along the beaches of the Riviera Maya during certain times of the year. The sargassum season typically runs from May to November, with the highest concentrations of seaweed typically occurring during the summer months of June through August.

During this time, you may encounter seaweed along the beaches, and it can impact the visibility and quality of the water for swimming and snorkeling. However, the amount and severity of seaweed can vary from year to year and even day to day, so it’s always a good idea to check with local authorities or your hotel or resort for updates on the seaweed conditions.

Many hotels and resorts in the Riviera Maya have measures in place to remove seaweed from the beaches and maintain the quality of the water. Some also have private beach areas that are cleaned more regularly to ensure guests can enjoy the beach without seaweed interference.

How do I know when the seaweed season is happening in Cancun?

To know when the seaweed season is happening in Cancun, you can check various sources for up-to-date information on seaweed conditions.

  1. Local news and weather websites: Local news and weather websites often provide information on seaweed conditions in Cancun. You can check websites such as The Cancun Sun, Cancun Magazine, and The Riviera Maya Times for updates on the seaweed situation.
  2. Social media: Social media platforms such as Twitter and Instagram can also provide updates on seaweed conditions in Cancun. You can search for hashtags like #CancunSeaweed or #SargassumAlert to find posts from locals and travelers sharing their experiences and observations.
  3. Tourism websites: The Cancun Tourism Board and other tourism websites may also provide information on seaweed conditions in the area. They may have live webcams and updates on beach conditions.
  4. Contact your hotel or resort: You can also contact your hotel or resort directly to ask about seaweed conditions. They may be able to provide information on beach conditions and any efforts being made to manage the seaweed.

Keep in mind that seaweed conditions can change quickly, so it’s always a good idea to check for the most recent information before your trip.

How to avoid seaweed while swimming in Cancun?

If you’re planning a trip to Cancun, you may be wondering how to avoid seaweed while swimming. Seaweed can be a nuisance, but there are some simple steps you can take to avoid it.

First, try to swim in areas where there is little or no seaweed. If you do come across seaweed, try to stay close to the shore where the water is usually clearer. You can also ask the lifeguards on duty for advice on the best areas to swim.

Second, if you do come into contact with seaweed, rinse off as soon as possible. Seaweed can cause skin irritation, so it’s important to remove it from your body as soon as possible.

Third, wear appropriate clothing when swimming. A wetsuit or rash guard can help protect your skin from seaweed and other irritants in the water.

By following these simple tips, you can enjoy a worry-free vacation in Cancun.

Cancun seaweed map

  1. The Cancun Sargassum Monitoring Network provides daily updates on seaweed conditions in the area, including Cancun and nearby beaches. You can visit their website at
  2. The Riviera Maya News also provides regular updates on seaweed conditions in the Cancun and Riviera Maya area. You can visit their website at
  3. The Mexican government’s official tourism website, Visit Mexico, also provides information on seaweed conditions in Cancun and other popular beach destinations. You can visit their website at

These resources can help you stay informed about the current seaweed conditions in Cancun and plan your trip accordingly.


How does seaweed affect beachgoers?

Seaweed can affect water clarity and make swimming difficult in some areas. When it decomposes, it can also produce a foul odor.

What is being done to manage the seaweed?

The Mexican government and local businesses have taken steps to manage the seaweed by using machinery to remove it from the beaches and creating barriers to prevent it from reaching the shore.

Should I avoid visiting Cancun during the seaweed season?

While seaweed season can affect the beach experience in Cancun, it is still possible to enjoy the area during this time. Some beaches may have less seaweed than others, and many hotels and resorts work to keep their beach areas clear of seaweed. It’s always a good idea to check with local sources for up-to-date information on seaweed conditions if you plan to visit Cancun during the seaweed season.


Seaweed season in Cancun is a unique opportunity to experience the culture and natural beauty of this vibrant region. With the right knowledge, you can make the most out of your visit by avoiding the busiest times and taking advantage of all that Cancun has to offer during the seaweed season. From swimming with dolphins to finding hidden gems on secluded beaches, there are plenty of exciting things for everyone to do in this stunning destination. So what are you waiting for? Start planning your trip today!