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.

Fog/Mist

45°F

7°C

Humidity 100%
Wind Speed SW 16 mph
Barometer 29.72 in (1006.5 mb)
Dewpoint 45°F (7°C)
Visibility 4.00 mi
Wind Chill38°F (3°C)
Last update 21 Mar 4:53 am EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Overnight

    Overnight: A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 41. Southwest wind around 17 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance Rain
    and Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 44. West wind 13 to 18 mph becoming north in the afternoon. Winds could gust as high as 29 mph.

    High: 44 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 40. North wind 5 to 8 mph becoming southeast after midnight.

    Low: 40 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of rain, mainly after 4pm. Patchy fog after 5pm. Otherwise, cloudy, with a high near 46. South wind 10 to 18 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Cloudy then
    Chance Rain
    and Patchy
    Fog

  • Sunday Night

    Sunday Night: Rain, mainly after 10pm. Patchy fog before 9pm. Low around 38. Southwest wind 10 to 13 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 38 °F

    Rain and
    Patchy Fog

  • Monday

    Monday: Rain, mainly before 9am. High near 41. Breezy, with a north wind 17 to 22 mph. Chance of precipitation is 80%.

    High: 41 °F

    Breezy. Rain
    then Chance
    Rain

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34. Breezy, with a north wind 17 to 20 mph.

    Low: 34 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 38. North wind 7 to 16 mph.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. Southwest wind 9 to 18 mph.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 41. Southwest wind around 17 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 44. West wind 13 to 18 mph becoming north in the afternoon. Winds could gust as high as 29 mph.
Saturday Night
Increasing clouds, with a low around 40. North wind 5 to 8 mph becoming southeast after midnight.
Sunday
A chance of rain, mainly after 4pm. Patchy fog after 5pm. Otherwise, cloudy, with a high near 46. South wind 10 to 18 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain, mainly after 10pm. Patchy fog before 9pm. Low around 38. Southwest wind 10 to 13 mph becoming north after midnight. Chance of precipitation is 80%.
Monday
Rain, mainly before 9am. High near 41. Breezy, with a north wind 17 to 22 mph. Chance of precipitation is 80%.
Monday Night
Mostly cloudy, with a low around 34. Breezy, with a north wind 17 to 20 mph.
Tuesday
Sunny, with a high near 38. North wind 7 to 16 mph.
Tuesday Night
Mostly cloudy, with a low around 35. Southwest wind 9 to 18 mph.
Wednesday
Partly sunny, with a high near 43. Southwest wind around 18 mph.
Wednesday Night
Mostly cloudy, with a low around 36. West wind 15 to 17 mph becoming northwest after midnight.
Thursday
Partly sunny, with a high near 44. South wind 13 to 15 mph.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 39. Breezy, with a southwest wind 16 to 24 mph. Chance of precipitation is 40%.
Friday
A chance of rain. Partly sunny, with a high near 45. Breezy, with a west wind 15 to 22 mph. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Siasconset MA
 41.33°N 69.98°W (Elev. 0 ft)
Last Update:
2:33 am EDT Mar 21, 2026
Forecast Valid:
5am EDT Mar 21, 2026-6pm EDT Mar 27, 2026
 
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Additional Resources

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