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

41°F

5°C

Humidity 93%
Wind Speed S 12 mph
Barometer NA
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 13 Jan 10:53 pm EST
Extended Forecast for

3 Miles NNE Siasconset MA

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Breezy, with a southwest wind 17 to 20 mph.

    Low: 40 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 44. Southwest wind 11 to 17 mph.

    High: 44 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers. Cloudy, with a low around 37. South wind around 10 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 8am, then a chance of rain between 8am and 10am. Mostly cloudy, with a high near 42. Breezy, with a west wind 13 to 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 42 °F

    Chance
    Showers then
    Partly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: A chance of snow before midnight, then a slight chance of freezing rain between midnight and 3am, then a slight chance of snow after 3am. The snow could be heavy at times. Mostly cloudy, with a low around 22. Breezy, with a west wind 20 to 22 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 22 °F

    Breezy. Heavy
    Snow then
    Slight Chance
    Wintry Mix

  • Friday

    Friday: Sunny, with a high near 38. Breezy, with a west wind 16 to 21 mph.

    High: 38 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32. Breezy, with a southwest wind 15 to 20 mph.

    Low: 32 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 41. Southwest wind 11 to 14 mph.

    High: 41 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of rain between 10pm and midnight. Mostly cloudy, with a low around 34. West wind around 10 mph. Chance of precipitation is 30%.

    Low: 34 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 40. Breezy, with a southwest wind 17 to 20 mph.
Wednesday
Mostly cloudy, with a high near 44. Southwest wind 11 to 17 mph.
Wednesday Night
A chance of showers. Cloudy, with a low around 37. South wind around 10 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A chance of showers before 8am, then a chance of rain between 8am and 10am. Mostly cloudy, with a high near 42. Breezy, with a west wind 13 to 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A chance of snow before midnight, then a slight chance of freezing rain between midnight and 3am, then a slight chance of snow after 3am. The snow could be heavy at times. Mostly cloudy, with a low around 22. Breezy, with a west wind 20 to 22 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday
Sunny, with a high near 38. Breezy, with a west wind 16 to 21 mph.
Friday Night
Mostly cloudy, with a low around 32. Breezy, with a southwest wind 15 to 20 mph.
Saturday
Partly sunny, with a high near 41. Southwest wind 11 to 14 mph.
Saturday Night
A chance of rain between 10pm and midnight. Mostly cloudy, with a low around 34. West wind around 10 mph. Chance of precipitation is 30%.
Sunday
A chance of rain after 11am, mixing with snow after 5pm. Partly sunny, with a high near 38. West wind 11 to 16 mph. Chance of precipitation is 30%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 28. West wind around 18 mph. Chance of precipitation is 30%.
M.L.King Day
Partly sunny, with a high near 34. Breezy, with a west wind 17 to 20 mph.
Monday Night
A chance of snow. Mostly cloudy, with a low around 25. Breezy, with a west wind 18 to 20 mph. Chance of precipitation is 30%.
Tuesday
A chance of snow. Partly sunny, with a high near 31. Breezy, with a west wind 20 to 24 mph. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Siasconset MA
 41.33°N 69.98°W (Elev. 0 ft)
Last Update:
2:38 pm EST Jan 13, 2026
Forecast Valid:
11pm EST Jan 13, 2026-6pm EST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation