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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Fog/Mist

71°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 71°F (22°C)
Visibility 5.00 mi
Last update 29 Aug 12:55 am EDT
Extended Forecast for

Mechanicsville MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. Light north wind.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 83. Northeast wind 5 to 7 mph.

    High: 83 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. Light and variable wind.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the morning.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South wind around 6 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. Light north wind.
Saturday
Partly sunny, with a high near 83. Northeast wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 68. Light and variable wind.
Sunday
Mostly sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 72. South wind around 6 mph.
Monday
Sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Friday
A slight chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville MD
 38.43°N 76.73°W (Elev. 148 ft)
Last Update:
10:53 pm EDT Aug 28, 2026
Forecast Valid:
1am EDT Aug 29, 2026-6pm EDT Sep 4, 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