Marriott Cancun Resort beach & sargassum forecast

Sargassum season at Marriott Cancun Resort

Sargassum risk at Marriott Cancun Resort typically peaks around July (high: moderate or heavier seaweed on the beach in an estimated 66% of weeks). Months most likely to see heavy seaweed: May, June and July. Lowest-risk months: January, October, November and December. Actual landings vary a lot by year, wind and currents; check the live conditions above.

Estimated share of weeks in each month with moderate or heavier seaweed on the beach. Veabird takes the landing season seen on Quintana Roo's beaches (a Puerto Morelos beach camera, 2015–2020, and the Mexican Navy's beach alerts, 2022–2026) and scales it by how often NOAA AOML satellites see notable seaweed within about 20 km of this stretch of coast: 55% of weeks here on average, against 54% off Quintana Roo, so the full season applies. The satellite share (2016–2024, the top fifth of all coast-weeks, adjusted for this beach's exposure of 94%) measures seaweed offshore, not on the sand: off the Riviera Maya it reads high even in winter, when little lands. Very low under 10%, Low 10–24%, Moderate 25–44%, High 45–69%, Very high 70%+. Beach faces 112°; onshore winds from that direction push seaweed ashore. The satellite record as open data.

Weather, water & seaweed by month at Marriott Cancun Resort

Average highs run from about 80°F in January to 89°F in July and August. The sea is warmest in August, September and October (about 85°F) and coolest in January, February and March (about 80°F). April is usually the driest, with about 8 rainy days; September is the wettest, with about 23 rainy days. Seaweed risk is usually lowest in October and highest in July.

Monthly averages from 6 years of ERA5 reanalysis (Open-Meteo) for this area's 0.5° grid cell; rainy days have at least 1 mm (0.04 in). Sargassum is the typical-year estimate described above. Any given year can differ.

Cleanup & barriers

Offshore barriers

Floating sargassum barriers deployed by Mexican Navy (SEMAR) and state along exposed Caribbean stretches; north Gulf-facing shore rarely needs them.

Public cleanup

SEMAR sargassum-collection vessels offshore; ZOFEMAT municipal crews on public beaches.

Resort crews

Large resorts run their own barrier/rake crews at dawn.

Typical clearing time

same-day

Safety notes

US State Dept: Quintana Roo, Level 2 (exercise increased caution)

• Caribbean-facing Hotel Zone beaches have strong surf; north-facing Playa Norte/Gulf side calmer.
• Use authorized taxis; stay in tourist zones at night.

Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.

Things to do near Cancún, MX

• Isla Mujeres & Playa Norte
• MUSA underwater museum
• Whale shark tours (Jun–Sep)
• Chichén Itzá day trip
• Holbox bioluminescence

Fly in for the best beach days

Suggested dates fall in October, typically the lowest-seaweed month ahead for Marriott Cancun Resort. Change them to match the live forecast above.

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Nearest airports

• Cancún Intl (CUN), ~12 km

Nearby resorts

• Grand Oasis Cancún Cancún, MX · 0 km
• Hard Rock Hotel Cancun Cancún, MX · 0 km
• Hilton Cancún Mar Caribe All-Inclusive Cancún, MX · 1 km
• Hotel Fiesta Americana Condesa Cancún, MX · 1 km
• Omni Cancun Hotel & Villas Cancún, MX · 1 km
• Paradisus Cancún Cancún, MX · 2 km