Traveler question · Updated October 25, 2026 · Sargassum changes week to week. Check current reports a few days before you travel.
Sargassum by month
| Months | Typical level | What to expect |
|---|---|---|
| December–February | Lowest | The most reliable clear-water months, and peak season for prices |
| March–April | Low to moderate | Usually good; the first arrivals can start in April |
| May–June | Rising | Varies by beach; east-facing beaches start to get hit |
| July–August | Peak | Heaviest on open-sea beaches like Tulum and Playa del Carmen |
| September–October | Falling | Improving, and also the peak of hurricane season |
| November | Usually low | A good-value shoulder month as the water clears |
Which beaches stay clearest?
Sargassum drifts in from the open Atlantic on the trade winds, so beaches that face east into the open Caribbean get the most, and beaches that face north, sit behind a reef or lie on the far side of an island get the least.
- Clearest: Playa Norte on Isla Mujeres, the north side of Cancun's Hotel Zone, Costa Mujeres and the west coast of Cozumel.
- Partly protected: Puerto Morelos, whose offshore reef catches much of it.
- Most affected: Tulum, Playa del Carmen, Akumal and the east-facing side of Cancun's Hotel Zone.
- Punta Cana: Bávaro's east-facing beaches can get heavy sargassum from about April to September; Cap Cana is often said to get less.
What happened in 2026, and the outlook
2026 was one of the heaviest sargassum years on record in the Mexican Caribbean, with local officials reporting record collection volumes and a record June across the Caribbean. The University of South Florida's satellite tracking showed amounts falling in July and August, with declines expected into November, and by early October Mexico's monitoring rated Quintana Roo's levels very low. That points to a good winter 2026–2027, though winds can still push patches onto individual beaches.
How to check before you go
- Quintana Roo's government and Mexico's Navy (Semar) publish color-coded sargassum reports, from green (little or none) to red (excessive).
- The University of South Florida's Sargassum Watch System publishes monthly satellite outlooks for the Caribbean.
- Recent guest photos of your specific resort's beach are often the best guide.
- Ask your resort whether it cleans the beach daily or uses offshore barriers; many do.
If it arrives on your trip
- Go to the beach early, before the day's arrivals and after the morning cleanup.
- Take a boat to Isla Mujeres or Cozumel's west side for clearer water.
- Swap a beach day for cenotes, ruins or snorkeling in a protected lagoon.
- Don't sit next to fresh piles on the sand: rotting seaweed smells bad and gives off gases.
More Cancun questions: Is Cancun safe? · Airport transfers · Where to stay · Seaweed season · Sharks and beach flags · Isla Mujeres day trip
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Sources
Monthly pattern and 2026 outlook: Pixan Travel, October 2026 (a tour operator) and How Is the Sargassum, October 2026. Satellite outlooks: University of South Florida. Punta Cana timing: our Punta Cana guide.
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