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

26°F

-3°C

Humidity 55%
Wind Speed W 9 mph
Barometer 30.14 in (1020.7 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 20 Jan 7:53 am EST
Extended Forecast for

2 Miles ENE Siasconset MA

  • Today

    Today: Sunny, with a high near 28. West wind 15 to 18 mph, with gusts as high as 33 mph.

    High: 28 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 21. West wind 10 to 16 mph, with gusts as high as 29 mph.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 41. Southwest wind 9 to 14 mph.

    High: 41 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 3am. Mostly cloudy, with a low around 34. Southwest wind around 15 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: A slight chance of rain before 2pm. Mostly sunny, with a high near 42. Southwest wind around 15 mph. Chance of precipitation is 20%.

    High: 42 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 29. West wind 11 to 14 mph.

    Low: 29 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 36. West wind 13 to 16 mph.

    High: 36 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 14. West wind around 17 mph.

    Low: 14 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow after 4pm. Mostly sunny, with a high near 21. Northwest wind 14 to 16 mph. Chance of precipitation is 30%.

    High: 21 °F

    Mostly Sunny
    then Chance
    Snow

Detailed Forecast

Today
Sunny, with a high near 28. West wind 15 to 18 mph, with gusts as high as 33 mph.
Tonight
Mostly clear, with a low around 21. West wind 10 to 16 mph, with gusts as high as 29 mph.
Wednesday
Partly sunny, with a high near 41. Southwest wind 9 to 14 mph.
Wednesday Night
A slight chance of rain after 3am. Mostly cloudy, with a low around 34. Southwest wind around 15 mph. Chance of precipitation is 20%.
Thursday
A slight chance of rain before 2pm. Mostly sunny, with a high near 42. Southwest wind around 15 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 29. West wind 11 to 14 mph.
Friday
Partly sunny, with a high near 36. West wind 13 to 16 mph.
Friday Night
Mostly cloudy, with a low around 14. West wind around 17 mph.
Saturday
A chance of snow after 4pm. Mostly sunny, with a high near 21. Northwest wind 14 to 16 mph. Chance of precipitation is 30%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 14. Northwest wind around 14 mph. Chance of precipitation is 40%.
Sunday
Snow likely. Mostly cloudy, with a high near 25. North wind around 14 mph. Chance of precipitation is 60%.
Sunday Night
Snow likely. Mostly cloudy, with a low around 17. North wind around 14 mph. Chance of precipitation is 60%.
Monday
A chance of snow. Partly sunny, with a high near 26. Northwest wind around 15 mph. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Siasconset MA
 41.28°N 69.97°W (Elev. 56 ft)
Last Update:
8:01 am EST Jan 20, 2026
Forecast Valid:
8am EST Jan 20, 2026-6pm EST Jan 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation