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

49°F

9°C

Humidity 83%
Wind Speed SW 14 mph
Barometer 30.13 in (1020.3 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 12 May 7:53 pm EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Tonight

    Tonight: Mostly clear, with a low around 51. Southwest wind 11 to 15 mph, with gusts as high as 25 mph.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. Southwest wind 10 to 17 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 53. Southeast wind 14 to 16 mph.

    Low: 53 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 61. East wind 14 to 16 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 61 °F

    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 50. East wind 7 to 9 mph. Chance of precipitation is 80%.

    Low: 50 °F

    Showers

  • Friday

    Friday: A chance of showers, mainly before 5pm. Mostly cloudy, with a high near 59. North wind 8 to 11 mph. Chance of precipitation is 40%.

    High: 59 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 51. Northwest wind around 10 mph.

    Low: 51 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 65. Southwest wind 10 to 17 mph.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. Southwest wind around 16 mph.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 51. Southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 61. Southwest wind 10 to 17 mph.
Wednesday Night
Mostly cloudy, with a low around 53. Southeast wind 14 to 16 mph.
Thursday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 61. East wind 14 to 16 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 50. East wind 7 to 9 mph. Chance of precipitation is 80%.
Friday
A chance of showers, mainly before 5pm. Mostly cloudy, with a high near 59. North wind 8 to 11 mph. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, with a low around 51. Northwest wind around 10 mph.
Saturday
Sunny, with a high near 65. Southwest wind 10 to 17 mph.
Saturday Night
Mostly clear, with a low around 55. Southwest wind around 16 mph.
Sunday
Sunny, with a high near 67. West wind around 14 mph.
Sunday Night
Mostly clear, with a low around 53. West wind 7 to 10 mph becoming north after midnight.
Monday
Mostly sunny, with a high near 64. East wind 5 to 7 mph becoming south in the afternoon.
Monday Night
Partly cloudy, with a low around 54. South wind 8 to 10 mph.
Tuesday
Partly sunny, with a high near 66. Southwest wind 13 to 16 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:
7:08 pm EDT May 12, 2026
Forecast Valid:
8pm EDT May 12, 2026-6pm EDT May 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation