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.

A Few Clouds

40°F

4°C

Humidity 73%
Wind Speed W 10 mph
Barometer NA
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 4 Dec 2:53 am EST
Extended Forecast for

Siasconset MA

  • Overnight

    Overnight: Partly cloudy, with a low around 33. West wind around 10 mph.

    Low: 33 °F

    Partly Cloudy

  • Thursday

    Thursday: Cloudy, then clearing during the afternoon, with a high near 45. Breezy, with a west wind 14 to 21 mph, with gusts as high as 37 mph.

    High: 45 °F

    Clearing Late
    and Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 21. Windy, with a northwest wind 16 to 26 mph, with gusts as high as 43 mph.

    Low: 21 °F

    Decreasing
    Clouds and
    Windy

  • Friday

    Friday: Mostly sunny, with a high near 37. North wind 6 to 9 mph becoming southwest in the afternoon.

    High: 37 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of rain and snow before 3am, then a chance of rain. Mostly cloudy, with a low around 30. South wind around 6 mph becoming east after midnight. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 30 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of rain. Mostly cloudy, with a high near 46. East wind 7 to 9 mph. Chance of precipitation is 50%.

    High: 46 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A chance of rain before 8pm. Mostly cloudy, with a low around 35. South wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 30%.

    Low: 35 °F

    Chance Rain
    then Partly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 44. Northwest wind 8 to 10 mph.

    High: 44 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 27. Northwest wind 7 to 13 mph.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 33. West wind around 10 mph.
Thursday
Cloudy, then clearing during the afternoon, with a high near 45. Breezy, with a west wind 14 to 21 mph, with gusts as high as 37 mph.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 21. Windy, with a northwest wind 16 to 26 mph, with gusts as high as 43 mph.
Friday
Mostly sunny, with a high near 37. North wind 6 to 9 mph becoming southwest in the afternoon.
Friday Night
A chance of rain and snow before 3am, then a chance of rain. Mostly cloudy, with a low around 30. South wind around 6 mph becoming east after midnight. Chance of precipitation is 30%. Little or no snow accumulation expected.
Saturday
A chance of rain. Mostly cloudy, with a high near 46. East wind 7 to 9 mph. Chance of precipitation is 50%.
Saturday Night
A chance of rain before 8pm. Mostly cloudy, with a low around 35. South wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 44. Northwest wind 8 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 27. Northwest wind 7 to 13 mph.
Monday
Partly sunny, with a high near 35. North wind around 15 mph.
Monday Night
Partly cloudy, with a low around 25. North wind 10 to 14 mph.
Tuesday
Partly sunny, with a high near 44. Northwest wind 9 to 11 mph becoming southwest in the afternoon.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 33. West wind around 11 mph. Chance of precipitation is 50%.
Wednesday
A chance of rain. Partly sunny, with a high near 46. West wind 11 to 13 mph. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Siasconset MA
 41.28°N 70°W (Elev. 49 ft)
Last Update:
12:51 am EST Dec 4, 2025
Forecast Valid:
3am EST Dec 4, 2025-6pm EST Dec 10, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation