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Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

82°F

28°C

Humidity 62%
Wind Speed E 15 mph
Barometer 30.03 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 20 Apr 8:56 am AST
Extended Forecast for

Guaynabo PR

  • Today

    Today: Scattered showers, mainly after noon. Partly sunny, with a high near 87. East wind 13 to 16 mph. Chance of precipitation is 40%.

    High: 87 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly after midnight. Partly cloudy, with a low around 72. East wind 7 to 9 mph. Chance of precipitation is 40%.

    Low: 72 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Isolated showers. Mostly sunny, with a high near 87. East northeast wind 7 to 13 mph. Chance of precipitation is 20%.

    High: 87 °F

    Isolated
    Showers

  • Tuesday Night

    Tuesday Night: Scattered showers, mainly after midnight. Partly cloudy, with a low around 72. East wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers. Partly sunny, with a high near 85. Northeast wind 5 to 11 mph. Chance of precipitation is 40%.

    High: 85 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Isolated showers. Partly cloudy, with a low around 71. Northeast wind 3 to 6 mph. Chance of precipitation is 10%.

    Low: 71 °F

    Isolated
    Showers

  • Thursday

    Thursday: Scattered showers, mainly after noon. Mostly sunny, with a high near 86. East northeast wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 86 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Thursday Night

    Thursday Night: Scattered showers. Partly cloudy, with a low around 72. East southeast wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Scattered
    Showers

  • Friday

    Friday: Showers likely, mainly after noon. Partly sunny, with a high near 85. Light east wind becoming east northeast 5 to 10 mph in the morning. Chance of precipitation is 60%.

    High: 85 °F

    Mostly Sunny
    then Showers
    Likely

Detailed Forecast

Today
Scattered showers, mainly after noon. Partly sunny, with a high near 87. East wind 13 to 16 mph. Chance of precipitation is 40%.
Tonight
Scattered showers, mainly after midnight. Partly cloudy, with a low around 72. East wind 7 to 9 mph. Chance of precipitation is 40%.
Tuesday
Isolated showers. Mostly sunny, with a high near 87. East northeast wind 7 to 13 mph. Chance of precipitation is 20%.
Tuesday Night
Scattered showers, mainly after midnight. Partly cloudy, with a low around 72. East wind 5 to 7 mph. Chance of precipitation is 30%.
Wednesday
Scattered showers. Partly sunny, with a high near 85. Northeast wind 5 to 11 mph. Chance of precipitation is 40%.
Wednesday Night
Isolated showers. Partly cloudy, with a low around 71. Northeast wind 3 to 6 mph. Chance of precipitation is 10%.
Thursday
Scattered showers, mainly after noon. Mostly sunny, with a high near 86. East northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Thursday Night
Scattered showers. Partly cloudy, with a low around 72. East southeast wind 5 to 7 mph. Chance of precipitation is 30%.
Friday
Showers likely, mainly after noon. Partly sunny, with a high near 85. Light east wind becoming east northeast 5 to 10 mph in the morning. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 71.
Saturday
Scattered showers. Partly sunny, with a high near 85. Chance of precipitation is 50%.
Saturday Night
Partly cloudy, with a low around 73.
Sunday
Showers likely. Mostly sunny, with a high near 85. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guaynabo PR
 18.4°N 66.1°W (Elev. 82 ft)
Last Update:
4:00 am AST Apr 20, 2026
Forecast Valid:
9am AST Apr 20, 2026-6pm AST Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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