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

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Hazardous Weather Conditions

Current conditions at

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

Fair

81°F

27°C

Humidity 57%
Wind Speed NE 15 G 23 mph
Barometer 29.93 in (1012.6 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 18 Mar 8:54 am ChST
Extended Forecast for

Tamuning GU

Coastal Flood Watch March 18, 09:47am until March 18, 04:00pm
High Surf Advisory March 18, 09:47am until March 20, 04:00pm
Click here for hazard details and duration
Coastal Flood Watch
High Surf Advisory
  •  
    Coastal Flood Watch March 18, 09:47am until March 18, 04:00pm
    High Surf Advisory March 18, 09:47am until March 20, 04:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Today

    High: 86 °F

    Isolated
    Showers

  • Tonight

    Tonight: Isolated showers. Mostly cloudy, with a low around 73. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Isolated
    Showers

  • Thursday

    Thursday: Isolated showers. Mostly sunny, with a high near 86. Northeast wind 9 to 15 mph, with gusts as high as 20 mph.

    High: 86 °F

    Isolated
    Showers

  • Thursday Night

    Thursday Night: Isolated showers. Partly cloudy, with a low around 72. Northeast wind 9 to 15 mph, with gusts as high as 22 mph.

    Low: 72 °F

    Isolated
    Showers

  • Friday

    Friday: Isolated showers. Mostly sunny, with a high near 86. East northeast wind 13 to 17 mph, with gusts as high as 23 mph.

    High: 86 °F

    Isolated
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Today
Isolated showers. Mostly sunny, with a high near 86. Northeast wind 13 to 15 mph, with gusts as high as 20 mph.
Tonight
Isolated showers. Mostly cloudy, with a low around 73. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Isolated showers. Mostly sunny, with a high near 86. Northeast wind 9 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Isolated showers. Partly cloudy, with a low around 72. Northeast wind 9 to 15 mph, with gusts as high as 22 mph.
Friday
Isolated showers. Mostly sunny, with a high near 86. East northeast wind 13 to 17 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Mostly cloudy, with a low around 72.
Monday
A chance of showers. Partly sunny, with a high near 89.
Monday Night
A chance of showers. Mostly cloudy, with a low around 72.
Tuesday
A chance of showers. Partly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tamuning GU
 13.49°N 144.79°E
Last Update:
6:06 am ChST Mar 18, 2026
Forecast Valid:
9am ChST Mar 18, 2026-6pm ChST Mar 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