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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Mostly Cloudy

75°F

24°C

Humidity 85%
Wind Speed NW 5 mph
Barometer 29.95 in (1014.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 18 Aug 6:55 am EDT
Extended Forecast for

3 Miles SE Lorton VA

  • Today

    Today: A slight chance of showers after 2pm. Mostly cloudy, with a high near 78. Northeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 78 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 8pm, then a slight chance of showers after 1am. Cloudy, with a low around 68. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Cloudy then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, mainly before 2pm. Patchy fog between 7am and 8am. Otherwise, mostly cloudy, with a high near 75. Northeast wind around 7 mph. Chance of precipitation is 30%.

    High: 75 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 67. East wind around 6 mph becoming calm after midnight.

    Low: 67 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers after 2pm. Partly sunny, with a high near 83. East wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers after 2pm. Mostly cloudy, with a high near 78. Northeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight
A slight chance of showers before 8pm, then a slight chance of showers after 1am. Cloudy, with a low around 68. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.
Tuesday
A chance of showers, mainly before 2pm. Patchy fog between 7am and 8am. Otherwise, mostly cloudy, with a high near 75. Northeast wind around 7 mph. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 67. East wind around 6 mph becoming calm after midnight.
Wednesday
A slight chance of showers after 2pm. Partly sunny, with a high near 83. East wind 3 to 6 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 67.
Friday
Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
A chance of showers. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Lorton VA
 38.66°N 77.21°W (Elev. 98 ft)
Last Update:
7:29 am EDT Aug 18, 2025
Forecast Valid:
7am EDT Aug 18, 2025-6pm EDT Aug 24, 2025
 
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