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Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

88°F

31°C

Humidity 66%
Wind Speed E 18 G 24 mph
Barometer 30.06 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 11 Oct 10:56 am AST
Extended Forecast for

Guaynabo PR

  • Today

    Today: Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 87. East southeast wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    High: 87 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly after midnight. Partly cloudy, with a low around 78. East southeast wind around 7 mph. Chance of precipitation is 30%.

    Low: 78 °F

    Scattered
    Showers

  • Columbus Day

    Columbus Day: Scattered showers, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 88. East wind 7 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 88 °F

    Scattered
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Isolated showers. Partly cloudy, with a low around 79. East wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 20%.

    Low: 79 °F

    Isolated
    Showers

  • Tuesday

    Tuesday: Scattered showers, then showers and possibly a thunderstorm after noon. High near 87. East northeast wind 5 to 10 mph becoming light in the afternoon. Chance of precipitation is 80%.

    High: 87 °F

    Scattered
    Showers then
    Showers

  • Tuesday Night

    Tuesday Night: Isolated showers. Partly cloudy, with a low around 79. East southeast wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 79 °F

    Isolated
    Showers

  • Wednesday

    Wednesday: Scattered showers. Partly sunny, with a high near 88. East wind 6 to 10 mph. Chance of precipitation is 50%.

    High: 88 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers. Partly cloudy, with a low around 79. East wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 79 °F

    Scattered
    Showers

  • Thursday

    Thursday: Showers likely, mainly after noon. Partly sunny, with a high near 88. Light east wind becoming east northeast 6 to 11 mph in the morning. Chance of precipitation is 60%.

    High: 88 °F

    Mostly Sunny
    then Showers
    Likely

Detailed Forecast

Today
Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 87. East southeast wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Tonight
Scattered showers, mainly after midnight. Partly cloudy, with a low around 78. East southeast wind around 7 mph. Chance of precipitation is 30%.
Columbus Day
Scattered showers, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 88. East wind 7 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Isolated showers. Partly cloudy, with a low around 79. East wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 20%.
Tuesday
Scattered showers, then showers and possibly a thunderstorm after noon. High near 87. East northeast wind 5 to 10 mph becoming light in the afternoon. Chance of precipitation is 80%.
Tuesday Night
Isolated showers. Partly cloudy, with a low around 79. East southeast wind 6 to 8 mph. Chance of precipitation is 20%.
Wednesday
Scattered showers. Partly sunny, with a high near 88. East wind 6 to 10 mph. Chance of precipitation is 50%.
Wednesday Night
Scattered showers. Partly cloudy, with a low around 79. East wind 3 to 6 mph. Chance of precipitation is 30%.
Thursday
Showers likely, mainly after noon. Partly sunny, with a high near 88. Light east wind becoming east northeast 6 to 11 mph in the morning. Chance of precipitation is 60%.
Thursday Night
Scattered showers. Partly cloudy, with a low around 79. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 78.
Saturday
Scattered showers. Partly sunny, with a high near 88. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Guaynabo PR
 18.38°N 66.11°W (Elev. 167 ft)
Last Update:
6:55 am AST Oct 11, 2026
Forecast Valid:
11am AST Oct 11, 2026-6pm AST Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation