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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 59%
Wind Speed E 14 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 20 Apr 9:56 am AST
Extended Forecast for

4 Miles SSE Guaynabo PR

  • Today

    Today: Scattered showers before noon, then scattered showers and thunderstorms between noon and 3pm, then scattered showers after 3pm. Partly sunny, with a high near 83. East wind around 14 mph. Chance of precipitation is 50%.

    High: 83 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly after midnight. Partly cloudy, with a low around 69. East southeast wind 5 to 7 mph. Chance of precipitation is 40%.

    Low: 69 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Scattered showers, mainly after noon. Mostly sunny, with a high near 83. East northeast wind 6 to 9 mph. Chance of precipitation is 30%.

    High: 83 °F

    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Scattered showers, mainly after midnight. Partly cloudy, with a low around 69. East wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 82. Light east wind becoming northeast 5 to 10 mph in the morning. Chance of precipitation is 40%.

    High: 82 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Isolated showers. Partly cloudy, with a low around 68. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.

    Low: 68 °F

    Isolated
    Showers

  • Thursday

    Thursday: Scattered showers, mainly after noon. Mostly sunny, with a high near 82. East northeast wind 5 to 9 mph. Chance of precipitation is 30%.

    High: 82 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Thursday Night

    Thursday Night: Scattered showers. Partly cloudy, with a low around 69. East southeast wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Scattered
    Showers

  • Friday

    Friday: Scattered showers, mainly after noon. Mostly sunny, with a high near 82. Calm wind becoming east 5 to 8 mph in the morning. Chance of precipitation is 50%.

    High: 82 °F

    Mostly Sunny
    then
    Scattered
    Showers

Detailed Forecast

Today
Scattered showers before noon, then scattered showers and thunderstorms between noon and 3pm, then scattered showers after 3pm. Partly sunny, with a high near 83. East wind around 14 mph. Chance of precipitation is 50%.
Tonight
Scattered showers, mainly after midnight. Partly cloudy, with a low around 69. East southeast wind 5 to 7 mph. Chance of precipitation is 40%.
Tuesday
Scattered showers, mainly after noon. Mostly sunny, with a high near 83. East northeast wind 6 to 9 mph. Chance of precipitation is 30%.
Tuesday Night
Scattered showers, mainly after midnight. Partly cloudy, with a low around 69. East wind 3 to 5 mph. Chance of precipitation is 30%.
Wednesday
Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 82. Light east wind becoming northeast 5 to 10 mph in the morning. Chance of precipitation is 40%.
Wednesday Night
Isolated showers. Partly cloudy, with a low around 68. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Thursday
Scattered showers, mainly after noon. Mostly sunny, with a high near 82. East northeast wind 5 to 9 mph. Chance of precipitation is 30%.
Thursday Night
Scattered showers. Partly cloudy, with a low around 69. East southeast wind 3 to 5 mph. Chance of precipitation is 30%.
Friday
Scattered showers, mainly after noon. Mostly sunny, with a high near 82. Calm wind becoming east 5 to 8 mph in the morning. Chance of precipitation is 50%.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Scattered showers. Mostly sunny, with a high near 82. Chance of precipitation is 50%.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Scattered showers. Mostly sunny, with a high near 82. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Guaynabo PR
 18.33°N 66.09°W (Elev. 390 ft)
Last Update:
4:00 am AST Apr 20, 2026
Forecast Valid:
10am AST Apr 20, 2026-6pm AST Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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