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Cohasset, MA Marine Weather Forecast

Station 44013 - BOSTON 16 NM East of Boston, MA

December 5, 2025 12:50 am EST
Location: 42.346N 70.651W
Wind Direction: NW (320°)
Wind Speed: 23.3 knots
Wind Gust: 29.2 knots
Significant Wave Height: 5.6 ft
Dominant Wave Period: 4 sec
Average Period: 4.1 sec
Mean Wave Direction: NW (319°)
Atmospheric Pressure: 30.27 in (1025.0 mb)
Air Temperature: 20.8°F (-6.2°C)
Dew Point: 9.9°F (-12.3°C)
Water Temperature: 48.2°F (9.0°C)


Overnight - 16°F
Dec 05, 2025
12 to 15 mph NW
Mostly Clear
Mostly clear, with a low around 16. Northwest wind 12 to 15 mph.
Friday - 30°F
Dec 05, 2025
6 to 9 mph W
Sunny
Sunny, with a high near 30. West wind 6 to 9 mph.
Friday Night - 25°F
Dec 05, 2025
7 mph SW
Mostly Cloudy
Mostly cloudy. Low around 25, with temperatures rising to around 32 overnight. Southwest wind around 7 mph.
Saturday - 42°F
Dec 06, 2025
5 to 9 mph S
Chance Rain And Snow
A slight chance of snow before 10am, then a chance of rain between 10am and 11am, then a chance of rain and snow. Mostly cloudy, with a high near 42. South wind 5 to 9 mph. Chance of precipitation is 30%.
Saturday Night - 31°F
Dec 06, 2025
8 to 12 mph W
Slight Chance Light Rain then Partly Cloudy
A slight chance of rain before 7pm. Partly cloudy, with a low around 31. West wind 8 to 12 mph. Chance of precipitation is 20%.
Sunday - 38°F
Dec 07, 2025
5 to 12 mph NW
Partly Sunny
Partly sunny, with a high near 38. Northwest wind 5 to 12 mph.
Sunday Night - 25°F
Dec 07, 2025
5 to 16 mph N
Chance Light Snow
A chance of snow between 7pm and 11pm, then a chance of rain and snow. Mostly cloudy, with a low around 25. North wind 5 to 16 mph. Chance of precipitation is 50%. New snow accumulation of 1 to 3 inches possible.
Monday - 31°F
Dec 08, 2025
17 to 22 mph NW
Chance Light Snow then Mostly Sunny
A chance of snow before noon. Mostly sunny, with a high near 31. Northwest wind 17 to 22 mph. Chance of precipitation is 40%. New snow accumulation of 1 to 3 inches possible.
Monday Night - 17°F
Dec 08, 2025
8 to 16 mph NW
Mostly Clear
Mostly clear, with a low around 17. Northwest wind 8 to 16 mph.
Tuesday - 36°F
Dec 09, 2025
7 to 13 mph SW
Mostly Sunny then Slight Chance Light Snow
A slight chance of snow after 4pm. Mostly sunny, with a high near 36. Southwest wind 7 to 13 mph.
Tuesday Night - 30°F
Dec 09, 2025
14 mph SW
Chance Rain And Snow
A chance of rain and snow before 4am. Mostly cloudy, with a low around 30. Southwest wind around 14 mph. Chance of precipitation is 40%.
Wednesday - 46°F
Dec 10, 2025
13 mph SW
Chance Light Rain
A chance of rain after 11am. Mostly cloudy, with a high near 46. Southwest wind around 13 mph. Chance of precipitation is 30%.
Wednesday Night - 39°F
Dec 10, 2025
13 mph SW
Light Rain Likely
Rain likely. Cloudy, with a low around 39. Southwest wind around 13 mph. Chance of precipitation is 60%.
Thursday - 45°F
Dec 11, 2025
15 mph W
Chance Light Rain
A chance of rain. Mostly cloudy, with a high near 45. West wind around 15 mph.

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