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

64°F

18°C

Humidity 78%
Wind Speed SW 9 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 17 Jun 9:53 am EDT
Extended Forecast for

6 Miles N Siasconset MA

  • Today

    Today: Mostly sunny, with a high near 69. Southeast wind around 8 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 62. South wind around 7 mph.

    Low: 62 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy dense fog before 11am, then patchy dense fog after 5pm. Otherwise, partly sunny, with a high near 73. Windy, with a south wind 13 to 18 mph increasing to 21 to 26 mph in the afternoon.

    High: 73 °F

    Patchy Dense
    Fog and Windy

  • Thursday Night

    Thursday Night: Patchy fog before 9pm. Otherwise, mostly cloudy, with a low around 68. Breezy, with a south wind 16 to 24 mph.

    Low: 68 °F

    Breezy.
    Patchy Fog
    then Partly
    Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 74. Breezy, with a southwest wind 15 to 21 mph.

    High: 74 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 68. Breezy, with a west wind 15 to 20 mph.

    Low: 68 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 77. Breezy, with a southwest wind 21 to 23 mph.

    High: 77 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67. West wind around 17 mph.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 73. Southwest wind 15 to 17 mph.

    High: 73 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 69. Southeast wind around 8 mph.
Tonight
Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 62. South wind around 7 mph.
Thursday
Patchy dense fog before 11am, then patchy dense fog after 5pm. Otherwise, partly sunny, with a high near 73. Windy, with a south wind 13 to 18 mph increasing to 21 to 26 mph in the afternoon.
Thursday Night
Patchy fog before 9pm. Otherwise, mostly cloudy, with a low around 68. Breezy, with a south wind 16 to 24 mph.
Juneteenth
Mostly sunny, with a high near 74. Breezy, with a southwest wind 15 to 21 mph.
Friday Night
Mostly clear, with a low around 68. Breezy, with a west wind 15 to 20 mph.
Saturday
Sunny, with a high near 77. Breezy, with a southwest wind 21 to 23 mph.
Saturday Night
Mostly clear, with a low around 67. West wind around 17 mph.
Sunday
Sunny, with a high near 73. Southwest wind 15 to 17 mph.
Sunday Night
Partly cloudy, with a low around 67. West wind 8 to 14 mph.
Monday
A chance of showers. Partly sunny, with a high near 72. South wind 7 to 13 mph. Chance of precipitation is 50%.
Monday Night
Showers likely. Mostly cloudy, with a low around 66. Southwest wind around 17 mph becoming northwest after midnight. Chance of precipitation is 60%.
Tuesday
A chance of showers. Mostly sunny, with a high near 72. North wind 13 to 15 mph. Chance of precipitation is 30%.
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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:
4:59 am EDT Jun 17, 2026
Forecast Valid:
10am EDT Jun 17, 2026-6pm EDT Jun 23, 2026
 
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