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.

Fog/Mist

61°F

16°C

Humidity 100%
Wind Speed S 9 mph
Barometer 29.99 in (1015.6 mb)
Dewpoint 61°F (16°C)
Visibility 0.75 mi
Last update 18 Jun 9:53 am EDT
Extended Forecast for

2 Miles NNW Siasconset MA

  • Today

    Today: Patchy fog. Otherwise, cloudy, with a high near 69. Southwest wind around 9 mph.

    High: 69 °F

    Patchy Fog

  • Tonight

    Tonight: A slight chance of showers. Patchy fog. Otherwise, cloudy, with a low around 61. South wind 7 to 9 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Juneteenth

    Juneteenth: Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 77. Southwest wind 8 to 14 mph.

    High: 77 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Isolated showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 1am. Partly cloudy, with a low around 62. Southwest wind around 15 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 71. West wind around 14 mph.

    High: 71 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Southwest wind 7 to 9 mph.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 71. Southwest wind 6 to 9 mph.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 62. Southwest wind around 8 mph.

    Low: 62 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 72. Southwest wind 10 to 14 mph.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog. Otherwise, cloudy, with a high near 69. Southwest wind around 9 mph.
Tonight
A slight chance of showers. Patchy fog. Otherwise, cloudy, with a low around 61. South wind 7 to 9 mph. Chance of precipitation is 20%.
Juneteenth
Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 77. Southwest wind 8 to 14 mph.
Thursday Night
Isolated showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 1am. Partly cloudy, with a low around 62. Southwest wind around 15 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 71. West wind around 14 mph.
Friday Night
Mostly clear, with a low around 61. Southwest wind 7 to 9 mph.
Saturday
Sunny, with a high near 71. Southwest wind 6 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 62. Southwest wind around 8 mph.
Sunday
Mostly sunny, with a high near 72. Southwest wind 10 to 14 mph.
Sunday Night
Partly cloudy, with a low around 64. Southwest wind around 10 mph.
Monday
Mostly sunny, with a high near 73. Southwest wind around 11 mph.
Monday Night
Partly cloudy, with a low around 64. Southwest wind around 10 mph.
Tuesday
Sunny, with a high near 74. Southwest wind 10 to 13 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Siasconset MA
 41.29°N 70.02°W (Elev. 33 ft)
Last Update:
8:28 am EDT Jun 18, 2025
Forecast Valid:
10am EDT Jun 18, 2025-6pm EDT Jun 24, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation