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

52°F

11°C

Humidity 86%
Wind Speed SW 6 mph
Barometer 29.92 in (1013.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 15 Apr 8:53 pm EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 3am. Patchy fog before 2am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 50. Southwest wind 7 to 10 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 56. Southwest wind 10 to 14 mph.

    High: 56 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 49. Southwest wind 11 to 15 mph.

    Low: 49 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: A chance of showers, mainly after 5pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 55. Southwest wind around 9 mph. Chance of precipitation is 30%.

    High: 55 °F

    Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 46. Northeast wind 7 to 9 mph.

    Low: 46 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 50. Northeast wind around 9 mph.

    High: 50 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 46. East wind around 8 mph.

    Low: 46 °F

    Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 5pm. Cloudy, with a high near 53. South wind 11 to 16 mph. Chance of precipitation is 60%.

    High: 53 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of rain showers before 5am, then a chance of rain and snow showers. Mostly cloudy, with a low around 41. Breezy, with a west wind 17 to 20 mph. Chance of precipitation is 50%.

    Low: 41 °F

    Breezy.
    Chance
    Showers then
    Chance
    Rain/Snow

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly after 3am. Patchy fog before 2am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 50. Southwest wind 7 to 10 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 56. Southwest wind 10 to 14 mph.
Thursday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 49. Southwest wind 11 to 15 mph.
Friday
A chance of showers, mainly after 5pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 55. Southwest wind around 9 mph. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 46. Northeast wind 7 to 9 mph.
Saturday
Mostly cloudy, with a high near 50. Northeast wind around 9 mph.
Saturday Night
Cloudy, with a low around 46. East wind around 8 mph.
Sunday
Showers likely, mainly after 5pm. Cloudy, with a high near 53. South wind 11 to 16 mph. Chance of precipitation is 60%.
Sunday Night
A chance of rain showers before 5am, then a chance of rain and snow showers. Mostly cloudy, with a low around 41. Breezy, with a west wind 17 to 20 mph. Chance of precipitation is 50%.
Monday
Mostly sunny, with a high near 46. West wind 15 to 18 mph.
Monday Night
Partly cloudy, with a low around 38. Northwest wind 13 to 17 mph.
Tuesday
Sunny, with a high near 49. Northwest wind 10 to 14 mph becoming west in the afternoon.
Tuesday Night
Partly cloudy, with a low around 43. Breezy, with a southwest wind 15 to 20 mph.
Wednesday
Partly sunny, with a high near 53. Southwest wind 15 to 17 mph.
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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:
6:33 pm EDT Apr 15, 2026
Forecast Valid:
9pm EDT Apr 15, 2026-6pm EDT Apr 22, 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