Coastal Storm Impacting the Mid-Atlantic; Heavy Rain and Below Average Temperatures Over the Plains

A coastal storm will bring widespread rain, gusty winds, shallow coastal flooding, rip currents, large surf and possible areal flooding over the Mid-Atlantic region into Wednesday. Heavy rains and thunderstorms, some severe, persist across the Plains. Above average temperatures expected across much of the CONUS, except over the Plains. Read More >

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Mostly Cloudy

79°F

26°C

Humidity 89%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 17 Sep 4:56 am AST
Extended Forecast for

Loiza PR

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm.  Cloudy, with a low around 77. East wind around 7 mph.  Chance of precipitation is 70%.

    Low: 77 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm.  High near 87. East wind 8 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    High: 87 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm.  Low around 77. East southeast wind 10 to 13 mph.  Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 77 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm.  High near 88. East southeast wind 11 to 14 mph.  Chance of precipitation is 80%.

    High: 88 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 78. East southeast wind around 7 mph.  Chance of precipitation is 60%.

    Low: 78 °F

    Showers
    Likely

  • Friday

    Friday: Scattered showers and thunderstorms.  Mostly cloudy, with a high near 89. East wind 8 to 13 mph.  Chance of precipitation is 50%.

    High: 89 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before midnight.  Mostly cloudy, with a low around 78. East southeast wind 6 to 9 mph.  Chance of precipitation is 60%.

    Low: 78 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 88. East wind 7 to 10 mph.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph becoming calm  in the evening.

    Low: 77 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm. Cloudy, with a low around 77. East wind around 7 mph. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm. High near 87. East wind 8 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Wednesday Night
Showers and possibly a thunderstorm. Low around 77. East southeast wind 10 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Thursday
Showers and possibly a thunderstorm. High near 88. East southeast wind 11 to 14 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 78. East southeast wind around 7 mph. Chance of precipitation is 60%.
Friday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 89. East wind 8 to 13 mph. Chance of precipitation is 50%.
Friday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 78. East southeast wind 6 to 9 mph. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 88. East wind 7 to 10 mph.
Saturday Night
Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 78.
Monday
Scattered showers. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 78.
Tuesday
Scattered showers. Partly sunny, with a high near 89. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Loiza PR
 18.44°N 65.89°W (Elev. 3 ft)
3:09 am AST Sep 17, 2025
5am AST Sep 17, 2025-6pm AST Sep 23, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database