Sargassum Season in Tulum & Playa del Carmen: When It Hits and Where to Swim Instead

Sargassum is the brown seaweed that drifts in from the Atlantic and washes up on Caribbean beaches. It is the number one question guests ask us before booking a stay in Tulum or Playa del Carmen, so here is an honest answer.

When is sargassum season?

Sargassum arrives in waves, and every year is different. As a rule of thumb:

• November to March: usually the clearest months. Most beaches are clean and the water is turquoise.
• April to May: the first arrivals. Some days are clear, others are not.
• June to August: peak season. 2026 has been one of the heavier years on record, with the southern Riviera Maya, including Tulum and Playa del Carmen, seeing heavy days through mid-summer.
• September to October: it eases off, with a mix of light and moderate days.

Conditions change daily and even from one beach to the next, depending on wind and currents. A beach covered in the morning can be cleaned by noon.

Is the water still swimmable?

Yes, in most places. Municipal crews and the Mexican Navy clean beaches daily during the season, and barriers out at sea catch a lot of it before it lands. What you will notice is a brownish tint in the shallows and seaweed piled along the sand on heavier days. It is harmless to touch when fresh, but decomposing piles smell, so most guests simply pick a different spot.

Where to swim when the beach is heavy

This is where the Riviera Maya shines. Some of the best swimming here never touches the sea:

• Cenotes: crystal-clear freshwater sinkholes, untouched by sargassum all year. Near Tulum, Gran Cenote, Cenote Calavera and Casa Cenote are local favorites. See our guide to cenotes.
• Laguna de Bacalar: a longer day trip south, with seven shades of blue and no seaweed.
• Your own pool: many MayanKey homes come with private pools, rooftop plunge pools or swim-up terraces, so a seaweed day can become a lazy pool day.
• Cozumel: the island's west coast is sheltered and usually stays clear, an easy ferry ride from Playa del Carmen.
• Akumal and Xel-Há: protected bays and inlets that often stay calmer than open beaches.

How to plan around it

1. Travel November to April if a perfect beach is your top priority.
2. Check a live sargassum map a few days before you go and again each morning.
3. Ask our concierge. We are on the ground every day and know which beaches are clear right now. Message us and we will point you to the best spot, or book a cenote tour or catamaran day for you.
4. Book a home with a pool for summer trips so the sea never decides your day.

The bottom line

Sargassum is part of life on the Mexican Caribbean, but it rarely ruins a trip. With cenotes, lagoons, islands and a private pool to fall back on, there is always somewhere beautiful to swim.

Ready to plan your stay? Browse our homes in Tulum and Playa del Carmen or see the guest services our concierge can arrange for you.