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

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

Fair

82°F

28°C

Humidity 88%
Wind Speed NE 5 mph
Barometer 29.86 in (1010.3 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 20 Sep 7:54 pm ChST
Extended Forecast for

Agat GU

  • Tonight

    Tonight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 78. Light and variable wind becoming south around 5 mph after midnight. Chance of precipitation is 50%.

    Low: 78 °F

    Scattered
    Showers

  • Monday

    Monday: Scattered showers and thunderstorms. Partly sunny, with a high near 87. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 40%.

    High: 87 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 78. South wind 7 to 9 mph. Chance of precipitation is 40%.

    Low: 78 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 86. South southeast wind 8 to 13 mph. Chance of precipitation is 60%.

    High: 86 °F

    Heavy Rain

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 77. South wind 10 to 13 mph. Chance of precipitation is 60%.

    Low: 77 °F

    Heavy Rain

  • Wednesday

    Wednesday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. Chance of precipitation is 50%.

    High: 86 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 77.

    Low: 77 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 77.

    Low: 77 °F

    Chance
    Showers

Detailed Forecast

Tonight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 78. Light and variable wind becoming south around 5 mph after midnight. Chance of precipitation is 50%.
Monday
Scattered showers and thunderstorms. Partly sunny, with a high near 87. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 40%.
Monday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 78. South wind 7 to 9 mph. Chance of precipitation is 40%.
Tuesday
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 86. South southeast wind 8 to 13 mph. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 77. South wind 10 to 13 mph. Chance of precipitation is 60%.
Wednesday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. Chance of precipitation is 50%.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 77.
Thursday
A chance of showers. Partly sunny, with a high near 86.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 77.
Friday
A chance of showers. Mostly cloudy, with a high near 86.
Friday Night
A chance of showers. Mostly cloudy, with a low around 77.
Saturday
A chance of showers. Partly sunny, with a high near 86.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 78.
Sunday
A chance of showers. Partly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Agat GU
 13.38°N 144.67°E
Last Update:
6:05 pm ChST Sep 20, 2026
Forecast Valid:
8pm ChST Sep 20, 2026-6pm ChST Sep 27, 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