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Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Light Rain

84°F

29°C

Humidity 84%
Wind Speed NE 14 mph
Barometer 30.01 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 29 Jun 12:56 pm AST
Extended Forecast for

Guaynabo PR

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 89. Heat index values as high as 103. East southeast wind around 16 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 89 °F

    Showers

  • Tonight

    Tonight: Scattered showers before midnight, then isolated showers after 3am. Widespread haze after 9pm. Partly cloudy, with a low around 77. East southeast wind 5 to 9 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Widespread haze. Sunny, with a high near 89. East southeast wind 11 to 17 mph, with gusts as high as 23 mph.

    High: 89 °F

    Haze

  • Tuesday Night

    Tuesday Night: Isolated showers. Widespread haze. Partly cloudy, with a low around 77. East wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Isolated
    Showers

  • Wednesday

    Wednesday: Isolated showers. Widespread haze. Mostly sunny, with a high near 88. East wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 88 °F

    Isolated
    Showers

  • Wednesday Night

    Wednesday Night: Widespread haze. Mostly clear, with a low around 77. East wind around 8 mph.

    Low: 77 °F

    Haze

  • Thursday

    Thursday: Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 88 °F

    Scattered
    Showers then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. East southeast wind 7 to 9 mph.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88. East wind 10 to 16 mph.

    High: 88 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 89. Heat index values as high as 103. East southeast wind around 16 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
Scattered showers before midnight, then isolated showers after 3am. Widespread haze after 9pm. Partly cloudy, with a low around 77. East southeast wind 5 to 9 mph. Chance of precipitation is 30%.
Tuesday
Widespread haze. Sunny, with a high near 89. East southeast wind 11 to 17 mph, with gusts as high as 23 mph.
Tuesday Night
Isolated showers. Widespread haze. Partly cloudy, with a low around 77. East wind 6 to 8 mph. Chance of precipitation is 20%.
Wednesday
Isolated showers. Widespread haze. Mostly sunny, with a high near 88. East wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Wednesday Night
Widespread haze. Mostly clear, with a low around 77. East wind around 8 mph.
Thursday
Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 77. East southeast wind 7 to 9 mph.
Friday
Sunny, with a high near 88. East wind 10 to 16 mph.
Friday Night
Clear, with a low around 77.
Independence Day
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guaynabo PR
 18.38°N 66.11°W (Elev. 167 ft)
Last Update:
1:11 pm AST Jun 29, 2026
Forecast Valid:
1pm AST Jun 29, 2026-6pm AST Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation