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

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

40°F

4°C

Humidity 76%
Wind Speed Calm
Barometer 30.15 in (1021.3 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 20 Mar 2:55 am EDT
Extended Forecast for

Merrifield VA

  • Overnight

    Overnight: Mostly clear, with a low around 39. Light south wind.

    Low: 39 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 69. Light south wind becoming southwest 9 to 14 mph in the morning. Winds could gust as high as 24 mph.

    High: 69 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Showers likely, mainly before 1am. Cloudy during the early evening, then gradual clearing, with a low around 49. Southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 64. North wind around 8 mph.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46. East wind around 5 mph becoming south after midnight.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday

    Monday: A chance of rain before 2pm. Partly sunny, with a high near 61. Chance of precipitation is 30%.

    High: 61 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 39. Light south wind.
Friday
Increasing clouds, with a high near 69. Light south wind becoming southwest 9 to 14 mph in the morning. Winds could gust as high as 24 mph.
Friday Night
Showers likely, mainly before 1am. Cloudy during the early evening, then gradual clearing, with a low around 49. Southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 64. North wind around 8 mph.
Saturday Night
Partly cloudy, with a low around 46. East wind around 5 mph becoming south after midnight.
Sunday
Partly sunny, with a high near 76.
Sunday Night
A chance of rain after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Monday
A chance of rain before 2pm. Partly sunny, with a high near 61. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 33.
Tuesday
Sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Mostly cloudy, with a high near 56.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Merrifield VA
 38.87°N 77.26°W (Elev. 299 ft)
Last Update:
2:22 am EDT Mar 20, 2026
Forecast Valid:
3am EDT Mar 20, 2026-6pm EDT Mar 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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