Culebra Beach sargassum & beach forecast
Culebra, PR · Puerto Rico, Puerto Rico · 18.330, -65.318
Updated : high seaweed, beach grade B, sea 86°F.
Veabird's call
Sunday is the call: B+, mostly dry and 86°F water.
March and May grade best, and seaweed is usually lowest in July.
Grades from Veabird's beach forecast; wording by AI (Muse Spark), checked against the forecast. Updated Nov 13, 01:00 UTC.
Tell me when Culebra 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 Culebra Beach
Does Culebra Beach get sargassum (seaweed)?
Yes, in season. Here the typical-year risk is moderate or higher from May to August and peaks in July (high). How much lands varies a lot by year, wind and currents.
What are the worst and best months for seaweed at Culebra Beach?
Worst: July, when heavy seaweed is most likely. Best: September through April, when the risk is usually low.
How warm is the water at Culebra Beach?
About 85°F in November. The sea is warmest in October (about 87°F) and coolest in February (about 80°F).
When is the best time to visit Culebra Beach?
For warm water, low seaweed and dry weather, aim for September through April. September is usually the quietest of those, with about 24 rainy days and a sea near 86°F; seaweed risk is low.
Are there sargassum barriers or beach cleanups at Culebra Beach?
Offshore barriers in Puerto Rico: none at scale. Public cleanup: Municipal and DRNA crews during heavy events; local volunteers. Typical clearing time: Same day at resorts; east/south-east beaches slower.
When is hurricane season at Culebra 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 Culebra Beach in 23 of the 55 seasons from 1971 to 2025, and a hurricane within 58 miles in 8. The riskiest stretch is around August 27, when the chance of a storm passing in any one week is about 5%; across all of September it is about 15%. Flexible bookings and travel insurance help in the peak weeks.
Sargassum season at Culebra Beach Resorts
Sargassum risk at Culebra Beach Resorts typically peaks around July (high: moderate or heavier seaweed on the beach in an estimated 46% of weeks). Months most likely to see heavy seaweed: July. Lowest-risk months: January, February, March, April, September, 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), 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: 38% of weeks here on average, against 54% off Quintana Roo, so 69% of that season. The satellite share (2016–2024, the top fifth of all coast-weeks, adjusted for this beach's exposure of 60%) 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 0°; 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.
Puerto Rico month by month
Typical weather, water temperature, seaweed and crowds for every month: the best time to visit Puerto Rico.
Weather, water & seaweed by month at Culebra Beach Resorts
Average highs run from about 80°F in February to 87°F in September. The sea is warmest in October (about 87°F) and coolest in February (about 80°F). February, April, October and December are usually the driest, with about 23 rainy days each; July is the wettest, with about 28 rainy days. Seaweed risk is usually lowest in October and highest in July.
| Month | Avg high | Sea | Rainy days | Sargassum |
|---|---|---|---|---|
| Jan | 81°F | 81°F | 24 | Very low |
| Feb | 80°F | 80°F | 23 | Low |
| Mar | 81°F | 81°F | 24 | Low |
| Apr | 82°F | 82°F | 23 | Low |
| May | 84°F | 83°F | 24 | Moderate |
| Jun | 85°F | 84°F | 24 | Moderate |
| Jul | 85°F | 84°F | 28 | High |
| Aug | 86°F | 85°F | 26 | Moderate |
| Sep | 87°F | 86°F | 24 | Low |
| Oct | 86°F | 87°F | 23 | Very low |
| Nov | 83°F | 85°F | 24 | Very low |
| Dec | 82°F | 82°F | 23 | 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 at scale
- Public cleanup
- Municipal and DRNA crews during heavy events; local volunteers
- Resort crews
- Resort crews rake hotel frontage
- Typical clearing time
- Same day at resorts; east/south-east beaches slower
Safety notes
US territory: no State Dept advisory; FBI/PR Police crime data — verify
- Car break-ins common at beach parking and tourist sites
- Rip currents cause frequent drownings on the north coast (Isla Verde, Luquillo, Isabela); few lifeguards
- Power outages still occur; hotels generally have backup generators
Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.
Things to do near Culebra, PR
- Old San Juan & El Morro
- El Yunque National Forest
- Bioluminescent bays (Vieques Mosquito Bay, Laguna Grande)
- Flamenco Beach (Culebra)
- Rincón surf & whale watching
- Luquillo kiosks
Fly in for the best beach days
Suggested dates fall in October, typically the lowest-seaweed month ahead for Culebra Beach Resorts. Change them to match the live forecast above.
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Nearest airports
- Benjamín Rivera Noriega (Culebra) (CPX), ~2 km
- Luis Muñoz Marín Intl (San Juan) (SJU), ~73 km
Nearby resorts
- W Retreat & Spa Vieques Vieques, PR · 28 km
- Esperanza (Vieques) Beach Resorts Esperanza, Vieques, PR · 31 km
- El Conquistador Resort Fajardo, PR · 33 km
- Carib Beach Resort Charlotte Amalie, St. Thomas, VI · 37 km
- Island Beachcomber Hotel Charlotte Amalie, St. Thomas, VI · 37 km
- Emerald Beach Resort Charlotte Amalie, St. Thomas, VI · 37 km
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