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.

Mostly Cloudy

58°F

14°C

Humidity 72%
Wind Speed SW 6 mph
Barometer 29.91 in (1012.9 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 15 Apr 8:53 am EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Today

    Today: Patchy fog after 2pm. Otherwise, partly sunny, with a high near 55. West wind around 8 mph becoming south in the afternoon.

    High: 55 °F

    Mostly Sunny
    then Patchy
    Fog

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly between 9pm and 5am. Patchy fog before 5am. Otherwise, mostly cloudy, with a low around 49. South wind 7 to 9 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 10am. Otherwise, partly sunny, with a high near 58. Southwest wind 9 to 11 mph.

    High: 58 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 49. Southwest wind around 11 mph.

    Low: 49 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers, mainly after 3pm. Partly sunny, with a high near 55. Southwest wind around 9 mph. Chance of precipitation is 30%.

    High: 55 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 46. Northeast wind around 8 mph. Chance of precipitation is 30%.

    Low: 46 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 50. Northeast wind around 7 mph.

    High: 50 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 46. East wind around 6 mph becoming south after midnight.

    Low: 46 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers after 10am. Mostly cloudy, with a high near 53. South wind 11 to 15 mph. Chance of precipitation is 40%.

    High: 53 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy fog after 2pm. Otherwise, partly sunny, with a high near 55. West wind around 8 mph becoming south in the afternoon.
Tonight
A chance of showers and thunderstorms, mainly between 9pm and 5am. Patchy fog before 5am. Otherwise, mostly cloudy, with a low around 49. South wind 7 to 9 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 58. Southwest wind 9 to 11 mph.
Thursday Night
Mostly cloudy, with a low around 49. Southwest wind around 11 mph.
Friday
A chance of showers, mainly after 3pm. Partly sunny, with a high near 55. Southwest wind around 9 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 46. Northeast wind around 8 mph. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 50. Northeast wind around 7 mph.
Saturday Night
Mostly cloudy, with a low around 46. East wind around 6 mph becoming south after midnight.
Sunday
A chance of showers after 10am. Mostly cloudy, with a high near 53. South wind 11 to 15 mph. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 42. Breezy, with a west wind 16 to 21 mph. Chance of precipitation is 50%.
Monday
A chance of showers. Partly sunny, with a high near 47. Breezy, with a west wind 18 to 21 mph. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 39. Northwest wind 16 to 18 mph.
Tuesday
Sunny, with a high near 48. West wind 14 to 17 mph.
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Forecast Area
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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:
2:29 am EDT Apr 15, 2026
Forecast Valid:
8am EDT Apr 15, 2026-6pm EDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation