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Cohasset Harbor, MA - (White Head) Marine Weather Forecast

Station 44013 - BOSTON 16 NM East of Boston, MA

August 18, 2026 12:40 am EDT
Location: 42.346N 70.651W
Wind Direction: E (90°)
Wind Speed: 3.9 knots
Wind Gust: 3.9 knots
Atmospheric Pressure: 29.84 in (1010.6 mb)
Air Temperature: 67.8°F (19.9°C)
Dew Point: 67.3°F (19.6°C)
Water Temperature: 68.4°F (20.2°C)


Overnight - 66°F
Aug 18, 2026
3 mph NE
Patchy Fog
Patchy fog and a slight chance of rain showers. Cloudy, with a low around 66. Northeast wind around 3 mph. Chance of precipitation is 20%.
Tuesday - 74°F
Aug 18, 2026
3 to 7 mph N
Patchy Fog then Mostly Cloudy
Patchy fog before 11am. Mostly cloudy, with a high near 74. North wind 3 to 7 mph.
Tuesday Night - 65°F
Aug 18, 2026
3 mph N
Mostly Cloudy then Patchy Fog
Patchy fog after 1am. Mostly cloudy, with a low around 65. North wind around 3 mph.
Wednesday - 84°F
Aug 19, 2026
1 to 6 mph SW
Patchy Fog then Mostly Sunny
Patchy fog before 9am. Mostly sunny, with a high near 84. Southwest wind 1 to 6 mph.
Wednesday Night - 67°F
Aug 19, 2026
6 mph SW
Partly Cloudy
Partly cloudy, with a low around 67. Southwest wind around 6 mph.
Thursday - 82°F
Aug 20, 2026
6 mph N
Mostly Sunny then Chance Showers And Thunderstorms
A slight chance of rain showers between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. North wind around 6 mph. Chance of precipitation is 30%.
Thursday Night - 64°F
Aug 20, 2026
5 mph SW
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Southwest wind around 5 mph. Chance of precipitation is 30%.
Friday - 76°F
Aug 21, 2026
3 to 7 mph NE
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 76. Northeast wind 3 to 7 mph.
Friday Night - 63°F
Aug 21, 2026
1 to 5 mph E
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 63. East wind 1 to 5 mph. Chance of precipitation is 30%.
Saturday - 75°F
Aug 22, 2026
3 to 8 mph NE
Chance Rain Showers
A chance of rain showers. Partly sunny, with a high near 75. Northeast wind 3 to 8 mph. Chance of precipitation is 40%.
Saturday Night - 65°F
Aug 22, 2026
6 mph E
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 65. East wind around 6 mph. Chance of precipitation is 40%.
Sunday - 77°F
Aug 23, 2026
5 to 9 mph SE
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 77. Southeast wind 5 to 9 mph. Chance of precipitation is 50%.
Sunday Night - 65°F
Aug 23, 2026
6 mph SW
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 65. Southwest wind around 6 mph. Chance of precipitation is 40%.
Monday - 80°F
Aug 24, 2026
5 to 8 mph SW
Chance Rain Showers
A chance of rain showers. Mostly sunny, with a high near 80. Southwest wind 5 to 8 mph.

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