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

Atmospheric River to Impact the Northwest; Windy Conditions in the Northeast

A strong atmospheric river moving into northern California later today will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through Wednesday. Gusty winds and isolated showers are expected today in the Northeast U.S. behind a cold front. Wind Advisories have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

Mostly Cloudy

80°F

27°C

Humidity 90%
Wind Speed E 6 mph
Barometer 29.82 in (1008.8 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 4 Nov 9:54 pm ChST
Extended Forecast for

Sinajana GU

Flood Watch November 5, 04:00am until November 7, 04:00pm
High Surf Advisory November 5, 04:00am until November 7, 04:00pm
Click here for hazard details and duration
Flood Watch
High Surf Advisory

  • Tonight

    Tonight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 76. East northeast wind around 11 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. Breezy, with an east wind 11 to 16 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 50%.

    High: 86 °F

    Scattered
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 76. Breezy, with an east wind 20 to 25 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.

    Low: 76 °F

    Heavy Rain
    and Breezy

  • Thursday

    Thursday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 86. Breezy, with a southeast wind 21 to 26 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.

    High: 86 °F

    Heavy Rain
    and Breezy

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 76. Breezy, with a south southeast wind 14 to 22 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 76 °F

    Heavy Rain
    and Breezy

  • Friday

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

    High: 86 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    Showers

  • Saturday

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

    High: 86 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    Showers

Detailed Forecast

Tonight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 76. East northeast wind around 11 mph. Chance of precipitation is 30%.
Wednesday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. Breezy, with an east wind 11 to 16 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 50%.
Wednesday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 76. Breezy, with an east wind 20 to 25 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.
Thursday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 86. Breezy, with a southeast wind 21 to 26 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 76. Breezy, with a south southeast wind 14 to 22 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. Chance of precipitation is 50%.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 76.
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. Partly sunny, with a high near 86.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 76.
Monday
A chance of showers. Partly sunny, with a high near 86.
Monday Night
Mostly cloudy, with a low around 76.
Veterans Day
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:
Sinajana GU
 13.45°N 144.74°E
Last Update:
6:05 pm ChST Nov 4, 2025
Forecast Valid:
10pm ChST Nov 4, 2025-6pm ChST Nov 11, 2025
 
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