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

69°F

21°C

Humidity 100%
Wind Speed W 5 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 69°F (21°C)
Visibility 0.25 mi
Last update 20 Aug 3:53 am EDT
Extended Forecast for

Nantucket MA

  • Today

    Today: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80. Southwest wind 5 to 8 mph.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Showers likely, mainly after 4am. Patchy fog before 11pm, then patchy fog after midnight. Otherwise, increasing clouds, with a low around 66. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 66 °F

    Showers
    Likely and
    Patchy Fog

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 76. East wind 6 to 10 mph. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °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 65. East wind around 8 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 11am. High near 78. East wind 10 to 13 mph. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 69. South wind 6 to 8 mph. Chance of precipitation is 80%.

    Low: 69 °F

    Showers

  • Sunday

    Sunday: Showers likely, mainly between 8am and 1pm. Mostly cloudy, with a high near 79. South wind 7 to 10 mph. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers before 4am. Mostly cloudy, with a low around 69. Southwest wind around 9 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 78. Southwest wind 8 to 11 mph.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80. Southwest wind 5 to 8 mph.
Tonight
Showers likely, mainly after 4am. Patchy fog before 11pm, then patchy fog after midnight. Otherwise, increasing clouds, with a low around 66. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers. Mostly cloudy, with a high near 76. East wind 6 to 10 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 65. East wind around 8 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 78. East wind 10 to 13 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 69. South wind 6 to 8 mph. Chance of precipitation is 80%.
Sunday
Showers likely, mainly between 8am and 1pm. Mostly cloudy, with a high near 79. South wind 7 to 10 mph. Chance of precipitation is 60%.
Sunday Night
A chance of showers before 4am. Mostly cloudy, with a low around 69. Southwest wind around 9 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 78. Southwest wind 8 to 11 mph.
Monday Night
Mostly clear, with a low around 67. West wind 9 to 11 mph.
Tuesday
Sunny, with a high near 77. West wind 9 to 11 mph.
Tuesday Night
Mostly clear, with a low around 67. West wind 9 to 11 mph.
Wednesday
Sunny, with a high near 77. Southwest wind 8 to 11 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Nantucket MA
 41.28°N 70.12°W (Elev. 49 ft)
Last Update:
2:31 am EDT Aug 20, 2026
Forecast Valid:
4am 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