National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

A Few Clouds

76°F

24°C

Humidity 77%
Wind Speed Calm
Barometer 30.00 in (1015.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 2 Jan 10:56 pm AST
Extended Forecast for

Guaynabo PR

  • Tonight

    Tonight: Scattered showers, mainly before midnight. Partly cloudy, with a low around 70. Light south southeast wind. Chance of precipitation is 30%.

    Low: 70 °F

    Scattered
    Showers

  • Saturday

    Saturday: Isolated showers after 9am. Mostly sunny, with a high near 85. South southeast wind 5 to 11 mph becoming east northeast in the afternoon. Chance of precipitation is 20%.

    High: 85 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Isolated showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 71. Southeast wind 5 to 7 mph. Chance of precipitation is 10%.

    Low: 71 °F

    Isolated
    Showers

  • Sunday

    Sunday: Isolated showers. Sunny, with a high near 86. Light southeast wind becoming east southeast 6 to 11 mph in the morning. Chance of precipitation is 20%.

    High: 86 °F

    Isolated
    Showers

  • Sunday Night

    Sunday Night: Isolated showers. Mostly clear, with a low around 70. Southeast wind 3 to 6 mph. Chance of precipitation is 10%.

    Low: 70 °F

    Isolated
    Showers

  • Monday

    Monday: Isolated showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 85. Light and variable wind becoming east northeast 6 to 11 mph in the morning. Chance of precipitation is 60%.

    High: 85 °F

    Isolated
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely. Mostly cloudy, with a low around 70. Light and variable wind. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Scattered showers. Mostly cloudy, with a high near 83. North northeast wind 5 to 9 mph. Chance of precipitation is 50%.

    High: 83 °F

    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Scattered showers. Partly cloudy, with a low around 69. East northeast wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Scattered
    Showers

Detailed Forecast

Tonight
Scattered showers, mainly before midnight. Partly cloudy, with a low around 70. Light south southeast wind. Chance of precipitation is 30%.
Saturday
Isolated showers after 9am. Mostly sunny, with a high near 85. South southeast wind 5 to 11 mph becoming east northeast in the afternoon. Chance of precipitation is 20%.
Saturday Night
Isolated showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 71. Southeast wind 5 to 7 mph. Chance of precipitation is 10%.
Sunday
Isolated showers. Sunny, with a high near 86. Light southeast wind becoming east southeast 6 to 11 mph in the morning. Chance of precipitation is 20%.
Sunday Night
Isolated showers. Mostly clear, with a low around 70. Southeast wind 3 to 6 mph. Chance of precipitation is 10%.
Monday
Isolated showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 85. Light and variable wind becoming east northeast 6 to 11 mph in the morning. Chance of precipitation is 60%.
Monday Night
Showers likely. Mostly cloudy, with a low around 70. Light and variable wind. Chance of precipitation is 60%.
Tuesday
Scattered showers. Mostly cloudy, with a high near 83. North northeast wind 5 to 9 mph. Chance of precipitation is 50%.
Tuesday Night
Scattered showers. Partly cloudy, with a low around 69. East northeast wind 3 to 6 mph. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Scattered showers. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Friday
Scattered showers. Partly sunny, with a high near 84. 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:
7:19 pm AST Jan 2, 2026
Forecast Valid:
11pm AST Jan 2, 2026-6pm AST Jan 9, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation