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.

Light Rain

69°F

21°C

Humidity 93%
Wind Speed NE 9 mph
Barometer 29.99 in (1015.6 mb)
Dewpoint 67°F (19°C)
Visibility 9.00 mi
Last update 22 Aug 4:53 pm EDT
Extended Forecast for

2 Miles NNE Siasconset MA

  • This Afternoon

    This Afternoon: Patchy drizzle with a slight chance of showers. Cloudy, with a high near 73. Northwest wind around 8 mph. Chance of precipitation is 20%.

    High: 73 °F

    Patchy
    Drizzle

  • Tonight

    Tonight: Showers likely, with thunderstorms also possible after 5am. Patchy fog after 9pm. Otherwise, cloudy, with a low around 64. Light and variable wind becoming east around 6 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: Showers and thunderstorms likely before noon, then a slight chance of showers and thunderstorms after 5pm. Patchy fog before 2pm. Otherwise, mostly cloudy, with a high near 75. Southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers
    Likely and
    Patchy Fog
    then Patchy
    Fog

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly between 2am and 3am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 67. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: Sunny, with a high near 76. Southwest wind 7 to 10 mph.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67. Southwest wind around 9 mph.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. Southwest wind 9 to 14 mph.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. West wind 9 to 13 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Southwest wind 7 to 11 mph.

    High: 75 °F

    Sunny

Detailed Forecast

This Afternoon
Patchy drizzle with a slight chance of showers. Cloudy, with a high near 73. Northwest wind around 8 mph. Chance of precipitation is 20%.
Tonight
Showers likely, with thunderstorms also possible after 5am. Patchy fog after 9pm. Otherwise, cloudy, with a low around 64. Light and variable wind becoming east around 6 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers and thunderstorms likely before noon, then a slight chance of showers and thunderstorms after 5pm. Patchy fog before 2pm. Otherwise, mostly cloudy, with a high near 75. Southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms, mainly between 2am and 3am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 67. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Monday
Sunny, with a high near 76. Southwest wind 7 to 10 mph.
Monday Night
Mostly clear, with a low around 67. Southwest wind around 9 mph.
Tuesday
Sunny, with a high near 75. Southwest wind 9 to 14 mph.
Tuesday Night
Mostly clear, with a low around 67. West wind 9 to 13 mph.
Wednesday
Sunny, with a high near 75. Southwest wind 7 to 11 mph.
Wednesday Night
Mostly clear, with a low around 68. Southwest wind 7 to 9 mph.
Thursday
Mostly sunny, with a high near 76. South wind 5 to 9 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 67. Southeast wind around 7 mph. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 77. South wind 7 to 10 mph. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 68. Southwest wind around 8 mph.
Saturday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Siasconset MA
 41.31°N 69.99°W (Elev. 49 ft)
Last Update:
3:11 pm EDT Aug 22, 2026
Forecast Valid:
5pm EDT Aug 22, 2026-6pm EDT Aug 29, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation