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.

Mostly Cloudy

66°F

19°C

Humidity 78%
Wind Speed E 15 G 24 mph
Barometer 30.14 in (1020.6 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 6 Jul 6:53 pm EDT
Extended Forecast for

6 Miles N Siasconset MA

  • Tonight

    Tonight: Showers likely, then showers and possibly a thunderstorm after 11pm. Some of the storms could produce heavy rainfall. Patchy fog after 3am. Low around 66. Breezy, with an east wind 20 to 23 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 66 °F

    Heavy Rain
    and Patchy
    Fog

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 2pm, then showers likely. Some of the storms could produce heavy rainfall. Patchy fog. High near 71. Breezy, with an east wind 15 to 21 mph. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

    High: 71 °F

    Heavy Rain
    and Patchy
    Fog

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly between midnight and 5am. Patchy fog. Otherwise, cloudy, with a low around 65. Northeast wind 8 to 18 mph becoming north after midnight. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 71. North wind 14 to 18 mph.

    High: 71 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 66. North wind 8 to 10 mph becoming southwest in the evening.

    Low: 66 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 74. Southwest wind 13 to 16 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 69. Southwest wind around 16 mph.

    Low: 69 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 77. Southwest wind around 15 mph.

    High: 77 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 70. West wind 9 to 14 mph.

    Low: 70 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers likely, then showers and possibly a thunderstorm after 11pm. Some of the storms could produce heavy rainfall. Patchy fog after 3am. Low around 66. Breezy, with an east wind 20 to 23 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Tuesday
Showers and possibly a thunderstorm before 2pm, then showers likely. Some of the storms could produce heavy rainfall. Patchy fog. High near 71. Breezy, with an east wind 15 to 21 mph. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.
Tuesday Night
A chance of showers, mainly between midnight and 5am. Patchy fog. Otherwise, cloudy, with a low around 65. Northeast wind 8 to 18 mph becoming north after midnight. Chance of precipitation is 40%.
Wednesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 71. North wind 14 to 18 mph.
Wednesday Night
Partly cloudy, with a low around 66. North wind 8 to 10 mph becoming southwest in the evening.
Thursday
Sunny, with a high near 74. Southwest wind 13 to 16 mph.
Thursday Night
Partly cloudy, with a low around 69. Southwest wind around 16 mph.
Friday
Mostly sunny, with a high near 77. Southwest wind around 15 mph.
Friday Night
Mostly cloudy, with a low around 70. West wind 9 to 14 mph.
Saturday
Mostly sunny, with a high near 75. North wind 10 to 13 mph.
Saturday Night
Partly cloudy, with a low around 69. Northeast wind around 6 mph becoming northwest after midnight.
Sunday
Sunny, with a high near 74. North wind 8 to 10 mph.
Sunday Night
Partly cloudy, with a low around 69. South wind around 9 mph.
Monday
Mostly sunny, with a high near 75. South wind 10 to 15 mph.
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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:
2:30 pm EDT Jul 6, 2026
Forecast Valid:
7pm EDT Jul 6, 2026-6pm EDT Jul 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation