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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

Fair

75°F

24°C

Humidity 83%
Wind Speed NE 7 mph
Barometer 29.89 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 21 Mar 12:54 am ChST
Extended Forecast for

3 Miles S Agat GU

High Surf Advisory March 21, 01:55am until March 22, 04:00pm
Click here for hazard details and duration
High Surf Advisory
  •  
    High Surf Advisory March 21, 01:55am until March 22, 04:00pm

    NOW until 4:00pm Sun

    High Surf Advisory

  • Overnight

    Low: 74 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers. Partly sunny, with a high near 82. East northeast wind 9 to 16 mph, with gusts as high as 21 mph.

    High: 82 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Isolated showers. Partly cloudy, with a low around 74. East northeast wind 11 to 17 mph, with gusts as high as 22 mph.

    Low: 74 °F

    Isolated
    Showers

  • Sunday

    Sunday: Isolated showers. Mostly sunny, with a high near 83. Northeast wind 13 to 18 mph, with gusts as high as 23 mph.

    High: 83 °F

    Isolated
    Showers

  • Sunday Night

    Sunday Night: Isolated showers. Partly cloudy, with a low around 75. East northeast wind 11 to 17 mph, with gusts as high as 22 mph.

    Low: 75 °F

    Isolated
    Showers

  • Monday

    Monday: Isolated showers. Mostly sunny, with a high near 83.

    High: 83 °F

    Isolated
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 74.

    Low: 74 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

Detailed Forecast

Overnight
Isolated showers. Partly cloudy, with a low around 74. East northeast wind around 10 mph.
Saturday
Isolated showers. Partly sunny, with a high near 82. East northeast wind 9 to 16 mph, with gusts as high as 21 mph.
Saturday Night
Isolated showers. Partly cloudy, with a low around 74. East northeast wind 11 to 17 mph, with gusts as high as 22 mph.
Sunday
Isolated showers. Mostly sunny, with a high near 83. Northeast wind 13 to 18 mph, with gusts as high as 23 mph.
Sunday Night
Isolated showers. Partly cloudy, with a low around 75. East northeast wind 11 to 17 mph, with gusts as high as 22 mph.
Monday
Isolated showers. Mostly sunny, with a high near 83.
Monday Night
Mostly cloudy, with a low around 74.
Tuesday
Partly sunny, with a high near 82.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 75.
Wednesday
Partly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 78.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Mostly cloudy, with a low around 78.
Friday
Mostly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Agat GU
 13.33°N 144.67°E
Last Update:
6:05 pm ChST Mar 20, 2026
Forecast Valid:
1am ChST Mar 21, 2026-6pm ChST Mar 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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