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Cornfield Harbor, MD - Md. Marine Weather Forecast

Station 44042 - Potomac, MD

December 5, 2025 12:54 am EST
Location: 38.033N 76.335W
Wind Direction: NNE (20°)
Wind Speed: 13.6 knots
Wind Gust: 15.6 knots
Significant Wave Height: 1.0 ft
Dominant Wave Period: 2 sec
Air Temperature: 37.9°F (3.3°C)
Water Temperature: 48.4°F (9.1°C)


Overnight - 29°F
Dec 05, 2025
13 mph NE
Heavy Snow
Snow. Cloudy, with a low around 29. Northeast wind around 13 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Friday - 39°F
Dec 05, 2025
8 to 12 mph NE
Heavy Snow
Snow before 9am, then rain and snow likely between 9am and 1pm, then snow likely and drizzle likely. Cloudy, with a high near 39. Northeast wind 8 to 12 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Friday Night - 36°F
Dec 05, 2025
5 to 8 mph N
Patchy Fog
A slight chance of drizzle before 7pm, then patchy fog and a slight chance of rain between 7pm and 8pm, then patchy fog and a slight chance of drizzle between 8pm and 1am. Cloudy, with a low around 36. North wind 5 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Saturday - 43°F
Dec 06, 2025
6 mph W
Mostly Cloudy
Mostly cloudy, with a high near 43. West wind around 6 mph.
Saturday Night - 37°F
Dec 06, 2025
5 to 9 mph NW
Partly Cloudy
Partly cloudy, with a low around 37. Northwest wind 5 to 9 mph.
Sunday - 44°F
Dec 07, 2025
5 to 8 mph E
Partly Sunny
Partly sunny, with a high near 44.
Sunday Night - 35°F
Dec 07, 2025
3 to 22 mph W
Mostly Cloudy
Mostly cloudy, with a low around 35.
Monday - 38°F
Dec 08, 2025
17 to 24 mph N
Mostly Sunny
Mostly sunny, with a high near 38.
Monday Night - 29°F
Dec 08, 2025
6 to 17 mph N
Mostly Clear
Mostly clear, with a low around 29.
Tuesday - 41°F
Dec 09, 2025
6 to 15 mph W
Mostly Sunny
Mostly sunny, with a high near 41.
Tuesday Night - 37°F
Dec 09, 2025
17 mph SW
Partly Cloudy
Partly cloudy, with a low around 37.
Wednesday - 50°F
Dec 10, 2025
15 to 18 mph SW
Mostly Cloudy
Mostly cloudy, with a high near 50.
Wednesday Night - 43°F
Dec 10, 2025
17 to 22 mph SW
Chance Light Rain
A chance of rain after 7pm. Mostly cloudy, with a low around 43. Chance of precipitation is 30%.
Thursday - 48°F
Dec 11, 2025
17 mph W
Chance Light Rain
A chance of rain. Partly sunny, with a high near 48.

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