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

73°F

23°C

Humidity 94%
Wind Speed SW 6 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 20 Aug 8:53 am EDT
Extended Forecast for

4 Miles WNW Nantucket MA

  • Today

    Today: Mostly sunny, with a high near 79. Southwest wind 6 to 9 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers likely, mainly after 3am. Patchy fog after midnight. Otherwise, increasing clouds, with a low around 68. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 68 °F

    Slight Chance
    Showers then
    Showers
    Likely and
    Patchy Fog

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 75. East wind 8 to 11 mph. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.

    High: 75 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly after midnight. Patchy fog before 9pm, then patchy fog after 11pm. Otherwise, cloudy, with a low around 67. East wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 11am. High near 77. East wind 11 to 14 mph. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 70. South wind 8 to 10 mph. Chance of precipitation is 80%.

    Low: 70 °F

    Showers

  • Sunday

    Sunday: Showers likely, mainly between 8am and noon. Mostly cloudy, with a high near 78. South wind 9 to 11 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers before 3am. Mostly cloudy, with a low around 71. Southwest wind around 11 mph. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 77. Southwest wind 10 to 14 mph.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 79. Southwest wind 6 to 9 mph.
Tonight
Showers likely, mainly after 3am. Patchy fog after midnight. Otherwise, increasing clouds, with a low around 68. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A chance of showers. Mostly cloudy, with a high near 75. East wind 8 to 11 mph. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Showers likely, mainly after midnight. Patchy fog before 9pm, then patchy fog after 11pm. Otherwise, cloudy, with a low around 67. East wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Showers, with thunderstorms also possible after 11am. High near 77. East wind 11 to 14 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 70. South wind 8 to 10 mph. Chance of precipitation is 80%.
Sunday
Showers likely, mainly between 8am and noon. Mostly cloudy, with a high near 78. South wind 9 to 11 mph. Chance of precipitation is 60%.
Sunday Night
A chance of showers before 3am. Mostly cloudy, with a low around 71. Southwest wind around 11 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 77. Southwest wind 10 to 14 mph.
Monday Night
Mostly clear, with a low around 69. West wind 11 to 15 mph.
Tuesday
Sunny, with a high near 76. Southwest wind 10 to 14 mph.
Tuesday Night
Mostly clear, with a low around 69. West wind 11 to 15 mph.
Wednesday
Sunny, with a high near 77. Southwest wind 9 to 13 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Nantucket MA
 41.29°N 70.17°W (Elev. 3 ft)
Last Update:
2:31 am EDT Aug 20, 2026
Forecast Valid:
9am EDT Aug 20, 2026-6pm EDT Aug 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation