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 >

Hazardous Weather Conditions

Current conditions at

Patuxent River, Naval Air Station (KNHK)

Lat: 38.28°NLon: 76.41°WElev: 39ft.

Overcast

92°F

33°C

Humidity 52%
Wind Speed Vrbl 6 mph
Barometer 29.91 in (1012.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 17 Aug 2:52 pm EDT
Extended Forecast for

Calvert Beach Long Beach MD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 88. South wind around 7 mph.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Isolated showers before 8pm, then scattered showers and thunderstorms between 8pm and midnight. Mostly cloudy, with a low around 74. South wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 50%.

    Low: 74 °F

    Scattered
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A chance of showers after 2pm. Mostly cloudy, with a high near 80. Northeast wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    High: 80 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly before 2am. Mostly cloudy, with a low around 71. Northeast wind 11 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Partly sunny, with a high near 78. East wind 10 to 13 mph. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    Showers

  • Tuesday Night

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

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 88. South wind around 7 mph.
Tonight
Isolated showers before 8pm, then scattered showers and thunderstorms between 8pm and midnight. Mostly cloudy, with a low around 74. South wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 50%.
Monday
A chance of showers after 2pm. Mostly cloudy, with a high near 80. Northeast wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers, mainly before 2am. Mostly cloudy, with a low around 71. Northeast wind 11 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers. Partly sunny, with a high near 78. East wind 10 to 13 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 71.
Friday
Sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 71.
Saturday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Calvert Beach Long Beach MD
 38.47°N 76.47°W (Elev. 0 ft)
Last Update:
1:29 pm EDT Aug 17, 2025
Forecast Valid:
2pm EDT Aug 17, 2025-6pm EDT Aug 23, 2025
 
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