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

80°F

27°C

Humidity 90%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 17 Aug 10:54 pm ChST
Extended Forecast for

Merizo GU

  • Tonight

    Tonight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 76. Light north wind. Chance of precipitation is 30%.

    Low: 76 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Scattered showers and thunderstorms after noon. Partly sunny, with a high near 86. Light and variable wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 86 °F

    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 75. North wind 5 to 7 mph. Chance of precipitation is 40%.

    Low: 75 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. North wind 7 to 11 mph. Chance of precipitation is 40%.

    High: 86 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 76. North northeast wind 6 to 10 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Scattered
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 76. Light north wind. Chance of precipitation is 30%.
Tuesday
Scattered showers and thunderstorms after noon. Partly sunny, with a high near 86. Light and variable wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.
Tuesday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 75. North wind 5 to 7 mph. Chance of precipitation is 40%.
Wednesday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. North wind 7 to 11 mph. Chance of precipitation is 40%.
Wednesday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 76. North northeast wind 6 to 10 mph. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 76.
Friday
Mostly sunny, with a high near 88.
Friday Night
Partly 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 76.
Sunday
A chance of showers. Mostly cloudy, with a high near 86.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 77.
Monday
A chance of showers. Mostly cloudy, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Merizo GU
 13.26°N 144.69°E
Last Update:
6:06 pm ChST Aug 17, 2026
Forecast Valid:
11pm ChST Aug 17, 2026-6pm ChST Aug 24, 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