Cayo Largo Beach sargassum & beach forecast
Cayo Largo, CU · Cuba's Cays (Jardines del Rey, Santa María, Cayo Largo), Cuba · 21.610, -81.550
Updated : low seaweed, beach grade C, sea 84°F.
Veabird's call
Wait for Saturday: A- with very low seaweed and 84°F water.
March and April grade best, and seaweed is usually lowest in January on this south-facing beach.
Grades from Veabird's beach forecast; wording by AI (Muse Spark), checked against the forecast. Updated Nov 12, 18:00 UTC.
Tell me when Cayo Largo Beach is clear
One email when the seaweed clears or the beach grades A, at most once a week per beach. We only ask for your email address, and every email has a one-click unsubscribe.
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Questions about Cayo Largo Beach
Does Cayo Largo Beach get sargassum (seaweed)?
Rarely. Veabird estimates moderate or heavier seaweed on the beach here in fewer than one week in ten in every month. Landings vary by year, wind and currents.
How warm is the water at Cayo Largo Beach?
About 84°F in November. The sea is warmest in August and September (about 88°F) and coolest in February (about 79°F).
When is the best time to visit Cayo Largo Beach?
For warm water and dry weather, aim for December through April. April is usually the quietest of those, with about 6 rainy days and a sea near 81°F.
When is hurricane season at Cayo Largo Beach, and how often do storms hit?
The Atlantic hurricane season runs June through November and peaks around September. A tropical storm passed within 86 miles of Cayo Largo Beach in 15 of the 55 seasons from 1971 to 2025, and a hurricane within 58 miles in 6. The riskiest stretch is around August 20, when the chance of a storm passing in any one week is about 2%; across all of October it is about 8%. Flexible bookings and travel insurance help in the peak weeks.
Sargassum season at Cayo Largo Beach Resorts
Sargassum is rare at Cayo Largo Beach Resorts: Veabird estimates moderate or heavier seaweed on the beach in fewer than one week in ten in every month.
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), the nearest coast with a multi-year beach record (this one has none), and scales it by how often NOAA AOML satellites see notable seaweed within about 20 km of this stretch of coast: 1% of weeks here on average, against 54% off Quintana Roo, so 2% of that season. The satellite share (2016–2024, the top fifth of all coast-weeks, adjusted for this beach's exposure of 50%) 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 180°; onshore winds from that direction push seaweed ashore. Satellite sargassum data: USF Optical Oceanography Lab (Sargassum Watch System) via NOAA AOML. The satellite record as open data.
Cuba's Cays month by month
Typical weather, water temperature, seaweed and crowds for every month: the best time to visit Cuba's Cays.
Weather, water & seaweed by month at Cayo Largo Beach Resorts
Average highs run from about 78°F in January and February to 86°F in July, August and September. The sea is warmest in August and September (about 88°F) and coolest in February (about 79°F). January is usually the driest, with about 4 rainy days; June is the wettest, with about 18 rainy days.
| Month | Avg high | Sea | Rainy days | Sargassum |
|---|---|---|---|---|
| Jan | 78°F | 80°F | 4 | Very low |
| Feb | 78°F | 79°F | 5 | Very low |
| Mar | 80°F | 81°F | 7 | Very low |
| Apr | 81°F | 81°F | 6 | Very low |
| May | 83°F | 85°F | 14 | Very low |
| Jun | 85°F | 86°F | 18 | Very low |
| Jul | 86°F | 87°F | 12 | Very low |
| Aug | 86°F | 88°F | 15 | Very low |
| Sep | 86°F | 88°F | 17 | Very low |
| Oct | 84°F | 86°F | 17 | Very low |
| Nov | 82°F | 84°F | 13 | Very low |
| Dec | 80°F | 81°F | 8 | Very low |
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
- None.
- Public cleanup
- Resort-run; cays are almost entirely resort frontage.
- Resort crews
- Hotel crews rake at dawn.
- Typical clearing time
- same-day to 2 days
Safety notes
US State Dept: Cuba, Level 2; US travel restrictions apply
- Isolated island resorts: limited medical care, evacuations by causeway or air.
- Mosquitoes/no-see-ums at dusk; bring repellent.
- Bring cash (EUR/CAD); US cards generally not accepted.
Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.
Things to do near Cayo Largo, CU
- Playa Pilar (Cayo Guillermo)
- Pedraplén causeways & flamingos
- Snorkel and catamaran trips
- Remedios & Caibarién (Santa María)
- Cayo Largo turtle farm & Playa Sirena
Fly in for the best beach days
Suggested dates are a week in December. Change them to match the live forecast above.
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Nearest airports
- Cayo Largo del Sur Vilo Acuña (CYO), ~1 km
Nearby resorts
- Villa Marina Cayo Largo, CU · 2 km
- Memories Cayo Largo Cayo Largo, CU · 3 km
- Villa Linda Mar Cayo Largo, CU · 4 km
- Villa Soledad Cayo Largo, CU · 4 km
- Villa Serena Cayo Largo, CU · 4 km
- Villa Caprice Cayo Largo, CU · 5 km
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