Wyndham Grand Rio Mar beach & sargassum forecast
Río Grande, PR · Puerto Rico, Puerto Rico · 18.396, -65.743
Updated : high seaweed, beach grade C-, sea 85°F.
Also listed as Wyndham Grand Rio Mar Rainforest Beach and Golf Resort.
Veabird's call
Sunday at B with mostly dry weather and 85°F water is fair, while Friday is C- on 98% rain.
March at B- and May at B grade best here, with March also the busiest month.
Grades from Veabird's beach forecast; wording by AI (Muse Spark), checked against the forecast. Updated Nov 13, 06:00 UTC.
Tell me when Wyndham Grand Rio Mar 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 Wyndham Grand Rio Mar
Does Río Grande get sargassum (seaweed)?
Yes, in season. At Wyndham Grand Rio Mar the typical-year risk is moderate or higher from May to August and peaks in July (moderate). How much lands varies a lot by year, wind and currents.
What are the worst and best months for seaweed at Wyndham Grand Rio Mar?
Worst: June and July, though even then the typical risk is moderate. Best: September through April, when the risk is usually low.
How warm is the water at Wyndham Grand Rio Mar?
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 Wyndham Grand Rio Mar?
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.
Does Wyndham Grand Rio Mar have a sargassum barrier or beach cleanup?
Veabird doesn't track barriers hotel by hotel; this is what the Puerto Rico area does. Offshore barriers in Puerto Rico: none at scale. Resort crews: Resort crews rake hotel frontage. Typical clearing time: Same day at resorts; east/south-east beaches slower.
When is hurricane season at Wyndham Grand Rio Mar, 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 Wyndham Grand Rio Mar in 24 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.
What guests say about Wyndham Grand Rio Mar Rainforest Beach and Golf Resort
Guests like Attentive and professional staff · Very clean rooms · Beautiful beach and mountain views · Wide range of amenities (pools, spa, golf, tennis, waterslides)
Watch for High food prices · High gift shop prices · Pool hours end too early (around 6pm) · Internet/wifi not great
- Cleanliness
9.0 - Service
9.5 - Location
9.5 - Room Quality
8.5 - Amenities
8.2 - Value for Money
7.5 - Food and Beverage
9.0 - Overall Experience
9.2
Read all 1,240 reviews · Compare on Expedia
Scores and reviews come from guests who stayed, through LiteAPI (Nuitée). The likes, watch-fors and category scores are an AI summary of those reviews. Partner links: Veabird may earn a commission.
Sargassum season at Wyndham Grand Rio Mar
Sargassum risk at Wyndham Grand Rio Mar typically peaks around July (moderate: moderate or heavier seaweed on the beach in an estimated 43% of weeks). 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: 35% of weeks here on average, against 54% off Quintana Roo, so 65% of that season. The satellite share (2016–2024, the top fifth of all coast-weeks, adjusted for this beach's exposure of 55%) 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 30°; 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 Wyndham Grand Rio Mar
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 | Moderate |
| 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 Río Grande, 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 Wyndham Grand Rio Mar. Change them to match the live forecast above.
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Nearest airports
- Luis Muñoz Marín Intl (San Juan) (SJU), ~28 km
Nearby resorts
- Fairfield by Marriott Luquillo Beach Río Grande, PR · 2 km
- Luquillo Sunrise Beach Inn Río Grande, PR · 3 km
- St. Regis Bahia Beach Resort Río Grande, PR · 6 km
- The St. Regis Bahia Beach Resort, Puerto Rico Río Grande, PR · 8 km
- El Conquistador Resort Fajardo, PR · 13 km
- Courtyard Isla Verde Beach Resort Isla Verde, Carolina, PR · 29 km
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