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

44°F

7°C

Humidity 83%
Wind Speed S 13 mph
Barometer 30.35 in (1027.8 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 9 Jan 10:53 am EST
Extended Forecast for

Siasconset MA

  • Today

    Today: Partly sunny, with a high near 44. South wind 10 to 14 mph.

    High: 44 °F

    Partly Sunny

  • Tonight

    Tonight: Showers likely, mainly before 3am. Patchy fog. Otherwise, cloudy, with a low around 37. South wind 13 to 18 mph becoming west after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: Rain likely, mainly after 4pm. Patchy fog before 9am, then patchy fog after 4pm. Otherwise, cloudy, with a high near 43. Northwest wind 6 to 9 mph becoming east in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 43 °F

    Rain Likely
    and Patchy
    Fog

  • Saturday Night

    Saturday Night: Rain. Patchy fog before 8pm. Low around 37. East wind 8 to 11 mph becoming southwest after midnight. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    Rain and
    Patchy Fog

  • Sunday

    Sunday: Rain. High near 42. West wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    High: 42 °F

    Rain

  • Sunday Night

    Sunday Night: A chance of rain, mainly before midnight. Partly cloudy, with a low around 30. Breezy, with a west wind 14 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.

    Low: 30 °F

    Chance Rain
    then Slight
    Chance Rain
    and Breezy

  • Monday

    Monday: Sunny, with a high near 38. Breezy, with a west wind 14 to 20 mph, with gusts as high as 30 mph.

    High: 38 °F

    Sunny and
    Breezy then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33. West wind around 14 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41. Southwest wind around 15 mph.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 44. South wind 10 to 14 mph.
Tonight
Showers likely, mainly before 3am. Patchy fog. Otherwise, cloudy, with a low around 37. South wind 13 to 18 mph becoming west after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely, mainly after 4pm. Patchy fog before 9am, then patchy fog after 4pm. Otherwise, cloudy, with a high near 43. Northwest wind 6 to 9 mph becoming east in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Rain. Patchy fog before 8pm. Low around 37. East wind 8 to 11 mph becoming southwest after midnight. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Rain. High near 42. West wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Sunday Night
A chance of rain, mainly before midnight. Partly cloudy, with a low around 30. Breezy, with a west wind 14 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.
Monday
Sunny, with a high near 38. Breezy, with a west wind 14 to 20 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 33. West wind around 14 mph.
Tuesday
Mostly sunny, with a high near 41. Southwest wind around 15 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind around 11 mph.
Wednesday
Mostly cloudy, with a high near 43. Southwest wind 10 to 14 mph.
Wednesday Night
A chance of rain. Cloudy, with a low around 34. Southwest wind around 9 mph becoming north after midnight. Chance of precipitation is 40%.
Thursday
A chance of rain. Mostly cloudy, with a high near 39. North wind 10 to 13 mph. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Siasconset MA
 41.28°N 69.97°W (Elev. 56 ft)
Last Update:
8:56 am EST Jan 9, 2026
Forecast Valid:
11am EST Jan 9, 2026-6pm EST Jan 15, 2026
 
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Additional Resources

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Chance of Precipitation