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Río Grande, Puerto Rico Weather
Current conditions
Observed at San Juan, Luis Munoz Marin International Airport · 25 min ago
Forecast
10-day-
Today
Isolated rain showers. Mostly sunny. High near 92, with temperatures falling to around 85 in the afternoon. Southeast wind 5 to 13 mph. Chance of precipitation is 20%. New rainfall amounts between a quarter and half of an inch possible.
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Tonight
Scattered rain showers before midnight, then scattered showers and thunderstorms. Mostly cloudy, with a low around 77. East southeast wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
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Friday
Scattered rain showers before noon, then scattered showers and thunderstorms. Mostly sunny. High near 92, with temperatures falling to around 85 in the afternoon. East southeast wind 6 to 15 mph. Chance of precipitation is 50%.
National Weather Service forecast updated 4 hrs ago.
Hourly
Hourly forecast- Now85°10%
- 9 AM88°10%
- 10 AM89°10%
- 11 AM91°10%
- 12 PM92°20%
- 1 PM92°20%
- 2 PM92°20%
- 3 PM91°20%
- 4 PM87°20%
- 5 PM85°20%
- 6 PM83°40%
- 7 PM82°40%
- 8 PM82°40%
- 9 PM81°40%
- 10 PM80°40%
- 11 PM80°40%
- Fri12 AM79°50%
- 1 AM79°50%
- 2 AM78°50%
- 3 AM78°50%
- 4 AM77°50%
- 5 AM77°50%
- 6 AM79°30%
- 7 AM83°30%
Daily forecast
Details- TodayOct 22Isolated Rain Showers50%77°92°
- FriOct 23Scattered Rain Showers60%77°92°
- SatOct 24Chance Showers And Thunderstorms60%77°90°
- SunOct 25Chance Showers And Thunderstorms60%77°91°
- MonOct 26Scattered Rain Showers40%77°91°
- TueOct 27Scattered Rain Showers30%76°91°
- WedOct 28Isolated Rain Showers20%77°92°
- ThuOct 29Showers0.13 in75°87°
- FriOct 30Mostly sunny0.02 in75°88°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Catano, PR reporting area · 2 hrs ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlySan Juan Area, records since 1898. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
Forecasters' discussion
From the National Weather Service office in SJU, issued 1 day ago
Key Messages
Issued at 140 AM AST Wed Oct 21 2026
* A relatively quiet and warm day will give way to wetter conditions as a surge of tropical moisture sweeps across the region Thursday through the weekend. More frequent showers and thunderstorms, including nighttime activity, may produce lightning, gusty winds, and locally heavy rainfall capable of causing flooding.
* A high risk of rip currents continues through this afternoon as northerly swell subsides. Conditions briefly improve Thursday before another swell brings renewed rip current hazards and potentially hazardous seas for small craft Friday into the weekend.
* Warm temperatures today may affect individuals sensitive or vulnerable to heat. Another period of warmer weather is possible Sunday into Monday.
Aviation
(06Z TAFS) Issued at 140 AM AST Wed Oct 21 2026
Strong, slow-moving TSRA over the Atl waters N of PR should gradually diminish aft sunrise, with VCSH/VCTS psbl near TJSJ/TJPS and USVI terminals. VFR conds expected to prevail overnight. Aftn SHRA/TSRA may produce brief MVFR/IFR cigs/vsbys at TJSJ/TJBQ, mainly due to +RA and low cigs. Activity should diminish aft 21/23Z. Sfc winds light/VRB overnight, bcmg SE at 5-10 kt aft 21/13Z, with sea-breeze variations and locally gusty winds near TSRA.
Marine
Issued at 140 AM AST Wed Oct 21 2026
Light to gentle southeasterly winds will gradually become more easterly and increase to moderate to locally fresh speeds toward the end of the week and into the weekend, particularly across the Caribbean waters. A long-period northerly swell continues to subside, allowing seas to gradually improve. However, another swell arriving Friday will likely bring hazardous seas for small craft through the weekend and into early next week. Increasing tropical moisture will also favor more frequent showers and thunderstorms, including nighttime activity, with lightning, gusty winds, and reduced visibility.
Beach Forecast
Issued at 140 AM AST Wed Oct 21 2026
A High Risk of Rip Currents remains in effect through this afternoon along north-facing beaches of Puerto Rico, Culebra, St. Thomas, and St. John. Conditions should briefly improve as the current northerly swell subsides. However, another swell arriving Friday will likely bring a renewed high risk of rip currents and possible high surf impacts along exposed northern beaches through the weekend and into early next week. Beachgoers should avoid swimming at affected beaches and stay away from exposed rocks and jetties. Showers and thunderstorms may also bring lightning and gusty winds to coastal areas.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.