The latest satellite maps suggest another difficult period for much of the Riviera Maya, but quiet relief for Cozumel.
Across the Atlantic as a whole, scientists at the University of South Florida (USF) estimated there was close to 29 million tons of sargassum in May, among the highest totals recorded for the month, and some expect 2026 could rival or exceed last year's record by the height of summer.
Only a portion of that belt drifts into the Mexican Caribbean, but the latest imagery from the USF's Sargassum Watch shows large concentrations moving through the western Caribbean, with significant amounts approaching parts of the mainland coast from Cancún south through Playa del Carmen.
Look across the channel at Cozumel, though, and the island's west coast is barely touched. That sheltered shore is where most of the big resorts, beach clubs, dive shops and cruise piers sit, and it mostly dodges the seaweed. Some smaller accommodation owners are using this as a pull for bookings too.
The reason is geography, not luck. The Riviera Maya mainland faces directly east into the open Caribbean and the Atlantic beyond, so it catches the seaweed first. Cozumel sits across a deep channel with its developed shore on the leeward, sheltered side, facing the mainland rather than the ocean.
Caribbean currents and winds generally carry much of the sargassum westward, with Cozumel's west coast protected by the island itself. When sargassum does reach the west coast, it's usually much lighter than on the mainland and often cleared quickly.
That's why most of the island's popular west-coast beaches and reefs remain comfortably swimmable while the mainland struggles, and it's one reason many visitors staying in Playa del Carmen hop on the ferry to spend a beach day in Cozumel.
None of this makes the Riviera Maya a write-off. Its beaches are long and lovely, the cleanup crews work hard, and conditions can swing from one week to the next. Cozumel simply has the sheltered position the mainland doesn't.
In the interest of honesty, one caveat: Cozumel's east coast does still get sargassum. That side faces the open Caribbean, and it's the island's untamed Other Side — rock arches, dunes, blowholes and crashing surf, not so many calm swimming bays. Only a handful of beach clubs operate out there, and the ones that do work hard to keep their stretch of sand clean. Many people come for the wild scenery and the delicious seafood, not a beach day, so seaweed is less likely to spoil the adventure.
For clear water and a proper beach day, though, the west side is the easy answer. Most of our beach tours and activities run along that sheltered shore, from snorkel boat trips over reefs like Villa Blanca and Paraiso to laid-back beach-club days, where you can take in the turquoise water and white sand Cozumel is famous for.
So if you're cruising in or staying on the mainland this summer, plan your beach time around Cozumel's west coast. Chances are you'll never lay eyes on the seaweed making headlines everywhere else.
Visit our Tours and Excursions section for more things to do in Cozumel.
Related items
How To Snorkel In Cozumel From Playa Del Carmen And Cancun — July 17, 2020
Cozumel Beaches in Great Shape — July 27, 2019
