The Riviera Maya’s Record Sargassum Season: Where the Clean Beaches Are

*Quintana Roo has already removed a record 72,700 tonnes of sargassum by late June, with projections reaching 119,000 tonnes by year-end — yet Cancún's sheltered bays are still running green.*

This is shaping up to be the Riviera Maya’s worst sargassum year on record, and the seaweed has already remapped where to swim. The good news for residents and visitors is that clear water is still easy to find if you know where — and when — to look.

A record year, by the numbers

Quintana Roo says it has removed about 72,700 tonnes of sargassum statewide through June 25, the largest containment and cleanup operation in its recent history. Playa del Carmen accounts for the biggest share at roughly 26,000 tonnes, about a third of the state total.

Cancún’s Benito Juárez follows at around 18,600 tonnes, with Puerto Morelos, Tulum and the southern Chetumal area next. State environmental authorities project the full-year total could reach roughly 120,000–130,000 tonnes, with the heaviest arrivals still ahead.

When it peaks

The sargassum season on the Mexican Caribbean typically runs from spring into autumn, and this year has arrived early and heavy. Monitoring networks warn the August-to-October window is usually the worst, and could add a further quarter to the volumes already collected.

That makes late summer the time to plan beach days most carefully. Conditions can also swing within a few days as winds and currents shift the mats on and offshore.

Where the clear water is

Cancún’s sheltered, north-facing bay beaches tend to fare best, and several — Playa del Niño, Langosta, Tortugas and Caracol — were flagged clear on the daily map. Isla Mujeres, especially Playa Norte, and Cozumel’s leeward western coast are also usually calmer.

For a reliably clear swim, the cenotes and lagoons inland are unaffected by sargassum entirely. Holbox, on the Gulf side north of the peninsula, is another dependable escape from the brown tide.

How to plan around it

The single most useful tool is the daily “Semáforo del sargazo,” a colour-coded map that rates each beach using up to five colors (blue, green, light yellow, dark yellow, red) that morning. Check it the night before and again on the day, since a green beach can turn amber overnight.

Beachfront hotels on the worst-hit stretches run barriers and daily cleaning, so a resort day can still work even when the public beach is buried. Many Riviera Maya hotels have also cut rates this season, a small silver lining for anyone booking now.

What it means for residents

For expats on the coast, the sargassum is a seasonal fact of life rather than a reason to stay away, but it does reshape the daily routine. Swimming, diving and beach work shift toward the clearer bays, the reef spots off Cozumel, and the cenotes.

It is also worth factoring into where you rent for the summer, since the open-ocean stretches at Playa del Carmen and Tulum bear the brunt. A lagoon-side or Cancún-bay base offers more reliable water through the peak.

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