National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Nantucket, Nantucket Memorial Airport (KACK)

Lat: 41.25°NLon: 70.06°WElev: 46ft.

Fair

60°F

16°C

Humidity 86%
Wind Speed SW 12 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 16 Jun 10:53 pm EDT
Extended Forecast for

6 Miles N Siasconset MA

  • Tonight

    Tonight: Increasing clouds, with a low around 55. Southwest wind 6 to 10 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A slight chance of showers between 11am and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 70. Southeast wind 8 to 10 mph. Chance of precipitation is 20%.

    High: 70 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 56. Southeast wind around 7 mph.

    Low: 56 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A chance of showers, mainly after 11am. Patchy fog between 7am and 10am. Otherwise, mostly cloudy, with a high near 72. Breezy, with a south wind 13 to 18 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 30%.

    High: 72 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: A slight chance of showers before 9pm. Partly cloudy, with a low around 62. Breezy, with a southwest wind 17 to 25 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Breezy.
    Slight Chance
    Showers then
    Partly Cloudy

  • Juneteenth

    Juneteenth: A slight chance of showers after 9am. Mostly sunny, with a high near 73. Breezy, with a southwest wind 16 to 22 mph. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. Breezy, with a west wind 14 to 20 mph.

    Low: 59 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 73. Breezy, with a west wind 18 to 22 mph.

    High: 73 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58. West wind 15 to 17 mph.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 55. Southwest wind 6 to 10 mph.
Wednesday
A slight chance of showers between 11am and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 70. Southeast wind 8 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 56. Southeast wind around 7 mph.
Thursday
A chance of showers, mainly after 11am. Patchy fog between 7am and 10am. Otherwise, mostly cloudy, with a high near 72. Breezy, with a south wind 13 to 18 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers before 9pm. Partly cloudy, with a low around 62. Breezy, with a southwest wind 17 to 25 mph. Chance of precipitation is 20%.
Juneteenth
A slight chance of showers after 9am. Mostly sunny, with a high near 73. Breezy, with a southwest wind 16 to 22 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 59. Breezy, with a west wind 14 to 20 mph.
Saturday
Sunny, with a high near 73. Breezy, with a west wind 18 to 22 mph.
Saturday Night
Mostly clear, with a low around 58. West wind 15 to 17 mph.
Sunday
Sunny, with a high near 74. West wind 15 to 17 mph.
Sunday Night
Partly cloudy, with a low around 60. West wind 9 to 14 mph.
Monday
A chance of showers. Partly sunny, with a high near 73. Southwest wind 8 to 11 mph becoming southeast in the afternoon. Chance of precipitation is 40%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 58. East wind 11 to 14 mph becoming northwest after midnight. Chance of precipitation is 50%.
Tuesday
A chance of showers. Partly sunny, with a high near 72. North wind around 14 mph. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles N Siasconset MA
 41.35°N 70.01°W (Elev. 0 ft)
Last Update:
8:21 pm EDT Jun 16, 2026
Forecast Valid:
11pm EDT Jun 16, 2026-6pm EDT Jun 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation