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

Nantucket, Nantucket Memorial Airport (KACK)

Lat: 41.25°NLon: 70.06°WElev: 46ft.

Fair

27°F

-3°C

Humidity 51%
Wind Speed NW 10 mph
Barometer NA
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 9 Dec 8:53 am EST
Extended Forecast for

Siasconset MA

  • Today

    Today: Increasing clouds, with a high near 34. Northwest wind 5 to 7 mph becoming southwest in the afternoon.

    High: 34 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A slight chance of snow showers before 11pm, then a chance of rain showers between 11pm and 4am. Mostly cloudy, with a temperature rising to around 42 by 4am. South wind 11 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 31 °F⇑

    Chance
    Rain/Snow
    then Chance
    Showers

  • Wednesday

    Wednesday: Rain, mainly after 5pm. High near 51. Breezy, with a south wind 15 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Mostly Cloudy
    then Rain and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain likely before 10pm, then a chance of showers between 10pm and 4am. Mostly cloudy, with a low around 37. Breezy, with a west wind 20 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Breezy. Rain
    Likely then
    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 42. Breezy, with a west wind 20 to 25 mph, with gusts as high as 36 mph.

    High: 42 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 29. Breezy, with a west wind 16 to 25 mph.

    Low: 29 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. West wind 15 to 18 mph, with gusts as high as 30 mph.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers after 4am. Mostly cloudy, with a low around 31. West wind 10 to 14 mph. Chance of precipitation is 30%.

    Low: 31 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Mostly cloudy, with a high near 42. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 42 °F

    Chance
    Showers

Detailed Forecast

Today
Increasing clouds, with a high near 34. Northwest wind 5 to 7 mph becoming southwest in the afternoon.
Tonight
A slight chance of snow showers before 11pm, then a chance of rain showers between 11pm and 4am. Mostly cloudy, with a temperature rising to around 42 by 4am. South wind 11 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday
Rain, mainly after 5pm. High near 51. Breezy, with a south wind 15 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain likely before 10pm, then a chance of showers between 10pm and 4am. Mostly cloudy, with a low around 37. Breezy, with a west wind 20 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 42. Breezy, with a west wind 20 to 25 mph, with gusts as high as 36 mph.
Thursday Night
Mostly cloudy, with a low around 29. Breezy, with a west wind 16 to 25 mph.
Friday
Mostly sunny, with a high near 39. West wind 15 to 18 mph, with gusts as high as 30 mph.
Friday Night
A chance of showers after 4am. Mostly cloudy, with a low around 31. West wind 10 to 14 mph. Chance of precipitation is 30%.
Saturday
A chance of showers. Mostly cloudy, with a high near 42. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Saturday Night
A chance of rain and snow before 11pm, then a chance of rain between 11pm and 1am, then a chance of rain and snow after 1am. Mostly cloudy, with a low around 29. West wind around 14 mph. Chance of precipitation is 50%.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 37. Northwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 22. Northwest wind around 16 mph. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 33. Northwest wind 13 to 16 mph, with gusts as high as 26 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Siasconset MA
 41.28°N 70°W (Elev. 49 ft)
Last Update:
5:02 am EST Dec 9, 2025
Forecast Valid:
9am EST Dec 9, 2025-6pm EST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation