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Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

84°F

29°C

Humidity 80%
Wind Speed E 10 mph
Barometer 29.97 in (1014.6 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 14 Oct 5:56 pm AST
Extended Forecast for

Guaynabo PR

  • Tonight

    Tonight: Scattered showers, mainly between midnight and 3am. Partly cloudy, with a low around 80. East southeast wind 6 to 9 mph. Chance of precipitation is 40%.

    Low: 80 °F

    Scattered
    Showers

  • Thursday

    Thursday: Scattered showers, mainly between 9am and 3pm. Mostly sunny, with a high near 87. East northeast wind 8 to 14 mph. Chance of precipitation is 40%.

    High: 87 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: Scattered showers before 9pm, then scattered showers after midnight. Mostly cloudy during the early evening, then becoming mostly clear, with a low around 79. East southeast wind 3 to 8 mph. Chance of precipitation is 50%.

    Low: 79 °F

    Scattered
    Showers

  • Friday

    Friday: Scattered showers. Mostly sunny, with a high near 88. East northeast wind 6 to 14 mph. Chance of precipitation is 30%.

    High: 88 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Scattered showers, mainly after midnight. Partly cloudy, with a low around 79. East southeast wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 79 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers, mainly after noon. Mostly sunny, with a high near 87. East wind 7 to 13 mph. Chance of precipitation is 30%.

    High: 87 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 79. Southeast wind 5 to 8 mph.

    Low: 79 °F

    Partly Cloudy

  • Sunday

    Sunday: Scattered showers, mainly after noon. Mostly sunny, with a high near 88. East northeast wind 5 to 11 mph. Chance of precipitation is 30%.

    High: 88 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 79. Southeast wind 3 to 7 mph.

    Low: 79 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers, mainly between midnight and 3am. Partly cloudy, with a low around 80. East southeast wind 6 to 9 mph. Chance of precipitation is 40%.
Thursday
Scattered showers, mainly between 9am and 3pm. Mostly sunny, with a high near 87. East northeast wind 8 to 14 mph. Chance of precipitation is 40%.
Thursday Night
Scattered showers before 9pm, then scattered showers after midnight. Mostly cloudy during the early evening, then becoming mostly clear, with a low around 79. East southeast wind 3 to 8 mph. Chance of precipitation is 50%.
Friday
Scattered showers. Mostly sunny, with a high near 88. East northeast wind 6 to 14 mph. Chance of precipitation is 30%.
Friday Night
Scattered showers, mainly after midnight. Partly cloudy, with a low around 79. East southeast wind 5 to 7 mph. Chance of precipitation is 30%.
Saturday
Scattered showers, mainly after noon. Mostly sunny, with a high near 87. East wind 7 to 13 mph. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 79. Southeast wind 5 to 8 mph.
Sunday
Scattered showers, mainly after noon. Mostly sunny, with a high near 88. East northeast wind 5 to 11 mph. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 79. Southeast wind 3 to 7 mph.
Monday
Scattered showers, mainly after noon. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 79.
Tuesday
Scattered showers. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
Tuesday Night
Partly cloudy, with a low around 78.
Wednesday
Scattered showers. Partly sunny, with a high near 86. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guaynabo PR
 18.39°N 66.11°W (Elev. 151 ft)
Last Update:
2:53 pm AST Oct 14, 2026
Forecast Valid:
6pm AST Oct 14, 2026-6pm AST Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation