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.

Light Rain

80°F

27°C

Humidity 94%
Wind Speed S 3 mph
Barometer 29.81 in (1008.7 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 19 Sep 3:54 am ChST
Extended Forecast for

Merizo GU

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 85. West southwest wind around 8 mph. Chance of precipitation is 60%.

    Low: 85 °F

    Showers
    Likely

  • Saturday

    Saturday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 87. West southwest wind 6 to 9 mph. Chance of precipitation is 50%.

    High: 87 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 85. West wind 5 to 8 mph. Chance of precipitation is 40%.

    Low: 85 °F

    Scattered
    Showers

  • Sunday

    Sunday: Scattered showers and thunderstorms. Partly sunny, with a high near 88. West wind around 5 mph becoming calm. Chance of precipitation is 40%.

    High: 88 °F

    Scattered
    Showers

  • Sunday Night

    Sunday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 85. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 85 °F

    Scattered
    Showers

  • Monday

    Monday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 87. Chance of precipitation is 50%.

    High: 87 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 85.

    Low: 85 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 86.

    High: 86 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 85.

    Low: 85 °F

    Chance
    Showers

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 85. West southwest wind around 8 mph. Chance of precipitation is 60%.
Saturday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 87. West southwest wind 6 to 9 mph. Chance of precipitation is 50%.
Saturday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 85. West wind 5 to 8 mph. Chance of precipitation is 40%.
Sunday
Scattered showers and thunderstorms. Partly sunny, with a high near 88. West wind around 5 mph becoming calm. Chance of precipitation is 40%.
Sunday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 85. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Monday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 87. Chance of precipitation is 50%.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 85.
Tuesday
A chance of showers. Mostly cloudy, with a high near 86.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 85.
Wednesday
A chance of showers. Partly sunny, with a high near 86.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 85.
Thursday
A chance of showers. Partly sunny, with a high near 86.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 85.
Friday
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:
Merizo GU
 13.26°N 144.67°E
Last Update:
6:06 pm ChST Sep 18, 2026
Forecast Valid:
4am ChST Sep 19, 2026-6pm ChST Sep 25, 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