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

69°F

21°C

Humidity 93%
Wind Speed W 9 mph
Barometer 29.84 in (1010.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 10 Sep 11:53 pm EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Overnight

    Overnight: Partly cloudy, with a low around 67. Northwest wind 11 to 13 mph, with gusts as high as 25 mph.

    Low: 67 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 71. North wind 6 to 14 mph.

    High: 71 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 65. Southwest wind around 8 mph becoming north after midnight.

    Low: 65 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 69. East wind around 8 mph becoming southeast in the afternoon.

    High: 69 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 66. South wind 10 to 14 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 11am. Patchy fog. Otherwise, mostly cloudy, with a high near 73. Southeast wind 13 to 15 mph. Chance of precipitation is 70%.

    High: 73 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday Night

    Sunday Night: A chance of showers between 8pm and 3am. Mostly cloudy, with a low around 68. Southwest wind around 10 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 71. North wind around 14 mph.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. North wind around 14 mph.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 67. Northwest wind 11 to 13 mph, with gusts as high as 25 mph.
Friday
Partly sunny, then gradually becoming sunny, with a high near 71. North wind 6 to 14 mph.
Friday Night
Clear, with a low around 65. Southwest wind around 8 mph becoming north after midnight.
Saturday
Sunny, with a high near 69. East wind around 8 mph becoming southeast in the afternoon.
Saturday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 66. South wind 10 to 14 mph. Chance of precipitation is 20%.
Sunday
Showers likely, with thunderstorms also possible after 11am. Patchy fog. Otherwise, mostly cloudy, with a high near 73. Southeast wind 13 to 15 mph. Chance of precipitation is 70%.
Sunday Night
A chance of showers between 8pm and 3am. Mostly cloudy, with a low around 68. Southwest wind around 10 mph. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 71. North wind around 14 mph.
Monday Night
Partly cloudy, with a low around 63. North wind around 14 mph.
Tuesday
Sunny, with a high near 67. Northeast wind around 11 mph.
Tuesday Night
Mostly clear, with a low around 63. South wind around 9 mph.
Wednesday
Sunny, with a high near 71. Southwest wind 10 to 13 mph.
Wednesday Night
Partly cloudy, with a low around 66. Southwest wind around 10 mph.
Thursday
Mostly sunny, with a high near 71. Southwest wind 11 to 13 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Siasconset MA
 41.33°N 69.98°W (Elev. 0 ft)
Last Update:
9:59 pm EDT Sep 10, 2026
Forecast Valid:
12am EDT Sep 11, 2026-6pm EDT Sep 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation