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.

Shallow Fog

63°F

17°C

Humidity 97%
Wind Speed Calm
Barometer 30.13 in (1020.3 mb)
Dewpoint 62°F (17°C)
Visibility 7.00 mi
Last update 29 Jun 8:53 pm EDT
Extended Forecast for

2 Miles ENE Siasconset MA

  • Tonight

    Tonight: Patchy fog before 11pm, then patchy fog after midnight. Otherwise, partly cloudy, with a low around 62. Light and variable wind.

    Low: 62 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 77. South wind 5 to 11 mph.

    High: 77 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 66. Southwest wind 10 to 14 mph.

    Low: 66 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. Southwest wind around 18 mph.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly after 10pm. Partly cloudy, with a low around 68. Southwest wind around 16 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 80. Southwest wind around 17 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 71. Southwest wind 13 to 15 mph.

    Low: 71 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 82. West wind 10 to 14 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 70. West wind 8 to 11 mph.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog before 11pm, then patchy fog after midnight. Otherwise, partly cloudy, with a low around 62. Light and variable wind.
Tuesday
Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 77. South wind 5 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 66. Southwest wind 10 to 14 mph.
Wednesday
Mostly sunny, with a high near 79. Southwest wind around 18 mph.
Wednesday Night
A chance of showers, mainly after 10pm. Partly cloudy, with a low around 68. Southwest wind around 16 mph. Chance of precipitation is 40%.
Thursday
Sunny, with a high near 80. Southwest wind around 17 mph.
Thursday Night
Clear, with a low around 71. Southwest wind 13 to 15 mph.
Friday
Sunny, with a high near 82. West wind 10 to 14 mph.
Friday Night
Partly cloudy, with a low around 70. West wind 8 to 11 mph.
Independence Day
Sunny, with a high near 81. West wind 7 to 11 mph becoming southwest in the afternoon.
Saturday Night
A chance of showers. Partly cloudy, with a low around 70. Southwest wind 7 to 9 mph. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 80. Southwest wind 7 to 10 mph.
Sunday Night
A chance of showers. Partly cloudy, with a low around 69. West wind around 7 mph. Chance of precipitation is 30%.
Monday
A chance of showers. Mostly sunny, with a high near 79. South wind 7 to 10 mph. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Siasconset MA
 41.28°N 69.97°W (Elev. 56 ft)
Last Update:
3:46 pm EDT Jun 29, 2026
Forecast Valid:
9pm EDT Jun 29, 2026-6pm EDT Jul 6, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation