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San Antonio, Puerto Rico Weather
Current conditions
Observed at San Juan, Luis Munoz Marin International Airport · 58 min ago
Forecast
10-day-
Friday
Isolated rain showers before noon, then showers and thunderstorms. Mostly cloudy, with a high near 92. East southeast wind 3 to 10 mph. Chance of precipitation is 100%.
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Friday Night
Scattered rain showers. Mostly cloudy, with a low around 77. East southeast wind around 8 mph. Chance of precipitation is 40%.
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Saturday
A chance of rain showers after noon. Mostly sunny, with a high near 92. Southeast wind around 10 mph. Chance of precipitation is 60%.
National Weather Service forecast updated 2 days ago.
Hourly
Hourly forecast- Now89°20%
- 11 AM91°20%
- 12 PM92°100%
- 1 PM92°100%
- 2 PM92°100%
- 3 PM91°100%
- 4 PM87°100%
- 5 PM85°100%
- 6 PM83°30%
- 7 PM82°30%
- 8 PM82°30%
- 9 PM81°30%
- 10 PM80°30%
- 11 PM80°30%
- Sat12 AM79°40%
- 1 AM79°40%
- 2 AM78°40%
- 3 AM78°40%
- 4 AM77°40%
- 5 AM77°40%
- 6 AM79°
- 7 AM83°
- 8 AM85°
- 9 AM88°
10-day forecast
Details- WedOct 21Mostly Sunny then Scattered Showers And Thunderstorms50%75°91°
- ThuOct 22Showers And Thunderstorms80%76°91°
- TodayOct 23Showers And Thunderstorms100%77°92°
- SatOct 24Mostly Sunny then Chance Rain Showers60%77°92°
- SunOct 25Mostly Sunny then Scattered Showers And Thunderstorms50%77°92°
- MonOct 26Scattered Rain Showers30%77°91°
- TueOct 27Isolated Rain Showers76°90°
- WedOct 28Sunny72°90°
- ThuOct 29Partly cloudy72°88°
- FriOct 30Sunny72°90°
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
Air quality is satisfactory, and air pollution poses little or no risk.
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 20 hrs ago
Key Messages
Issued at 158 PM AST Thu Oct 22 2026
- Seasonal to above-normal tropical moisture, combined with a southeasterly flow, will maintain a wetter pattern from this afternoon through Saturday. Heavy downpours may cause urban and small-stream flooding, rapid rises in river levels, and isolated flash flooding.
- This afternoon, the interior, north-central, and northwestern portions of Puerto Rico have the greatest potential for rainfall. Tonight, showers and thunderstorms are likely across the Caribbean waters and Mona Passage, with some activity potentially moving into southern and western Puerto Rico overnight.
- A northerly swell is expected to arrive late tonight into Friday, resulting in a high risk of rip currents along north- facing beaches beginning tomorrow and potentially continuing into early next week.
- Warm and humid conditions will persist, particularly during periods of sunshine. Heat impacts may become more pronounced early next week, especially along the coasts, in low-lying areas, interior valleys, and urban areas.
Aviation
(18Z TAFS) Issued at 158 PM AST Thu Oct 22 2026
Mainly VFR conds expected across PR and USVI terminals thru the evening, with ISOLD SHRA, resulting in VCSH mainly at TJBQ/TJSJ. Increasing moisture will favor more frequent SHRA/TSRA mainly across TJPS aft 23/03Z, with PROB30 TSRA and MVFR/IFR conds thru 23/14Z. Sfc winds mainly S-SE at 5-10 kt, bcmg L/V overnight, then 10-12 kt with higher gusts and sea-breeze variations.
Marine
Issued at 158 PM AST Thu Oct 22 2026
Light to gentle southeasterly winds will become east to southeast and increase from gentle to locally fresh Friday into the weekend as the pressure gradient tightens. A north-northwesterly swell is expected to arrive late tonight into early Friday, followed by additional pulses through the weekend. Seas will build to 5 to 6 feet across portions of the Atlantic waters and Mona Passage. Small craft operators should exercise caution. More frequent showers and thunderstorms, including nighttime activity, will bring lightning, gusty winds, reduced visibility, and locally higher seas.
Beach Forecast
Issued at 158 PM AST Thu Oct 22 2026
A northwesterly swell is expected to arrive late tonight into Friday, bringing back a high risk of rip currents along north- facing beaches of Puerto Rico, Culebra, and northern U.S. Virgin Islands. Hazardous swimming and beach conditions with breaking waves of around 6 to 7 feet are forecast. Additional swell pulses will likely maintain the high risk through the weekend and into early next week. Beachgoers are strongly urged to avoid entering the water at beaches under a high rip current risk. Heed all beach signs and instructions from lifeguards and local authorities. Also, shower and thunderstorm activity will bring lightning and gusty winds to coastal areas. If thunderstorms approach, leave the beach immediately and seek shelter.
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 4Search index and reflects what the press published. Terms of use.