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.

Overcast and Breezy

51°F

11°C

Humidity 83%
Wind Speed N 23 G 35 mph
Barometer NA
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 17 Oct 4:53 am EDT
Extended Forecast for

Siasconset MA

  • Today

    Today: Partly sunny, with a high near 59. Windy, with a north wind 26 to 29 mph.

    High: 59 °F

    Partly Sunny
    and Windy

  • Tonight

    Tonight: Partly cloudy, with a low around 49. Breezy, with a north wind 18 to 20 mph.

    Low: 49 °F

    Partly Cloudy
    and Breezy

  • Saturday

    Saturday: Sunny, with a high near 60. North wind 11 to 16 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51. North wind 5 to 7 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64. South wind 8 to 14 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers, mainly after midnight. Mostly cloudy, with a low around 54. South wind 13 to 15 mph. Chance of precipitation is 40%.

    Low: 54 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely. Mostly cloudy, with a high near 64. Southeast wind 16 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 53. Southwest wind 10 to 13 mph. Chance of precipitation is 50%.

    Low: 53 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 64. Southwest wind 11 to 13 mph.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 59. Windy, with a north wind 26 to 29 mph.
Tonight
Partly cloudy, with a low around 49. Breezy, with a north wind 18 to 20 mph.
Saturday
Sunny, with a high near 60. North wind 11 to 16 mph.
Saturday Night
Mostly clear, with a low around 51. North wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 64. South wind 8 to 14 mph.
Sunday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 54. South wind 13 to 15 mph. Chance of precipitation is 40%.
Monday
Showers likely. Mostly cloudy, with a high near 64. Southeast wind 16 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 53. Southwest wind 10 to 13 mph. Chance of precipitation is 50%.
Tuesday
Mostly sunny, with a high near 64. Southwest wind 11 to 13 mph.
Tuesday Night
Showers likely, mainly after 5am. Mostly cloudy, with a low around 53. Southwest wind around 11 mph. Chance of precipitation is 60%.
Wednesday
A chance of showers. Partly sunny, with a high near 63. West wind 11 to 14 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49. West wind around 13 mph. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 61. West wind around 14 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Siasconset MA
 41.28°N 70°W (Elev. 49 ft)
Last Update:
3:01 am EDT Oct 17, 2025
Forecast Valid:
5am EDT Oct 17, 2025-6pm EDT Oct 23, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation