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.

Overcast

66°F

19°C

Humidity 75%
Wind Speed E 12 mph
Barometer 30.16 in (1021.3 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 6 Jul 1:53 pm EDT
Extended Forecast for

6 Miles N Siasconset MA

  • This Afternoon

    This Afternoon: Showers, with thunderstorms also possible after 5pm. High near 70. East wind around 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 63. Breezy, with an east wind 14 to 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 63 °F

    Heavy Rain
    and Breezy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Northeast wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 69 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly before 5am. Mostly cloudy, with a low around 60. North wind 13 to 17 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 60 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. North wind 14 to 17 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64. Northwest wind 6 to 8 mph becoming southwest in the evening.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 77. Southwest wind 10 to 16 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 67. Southwest wind around 17 mph.

    Low: 67 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 76. Southwest wind around 15 mph.

    High: 76 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Showers, with thunderstorms also possible after 5pm. High near 70. East wind around 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 63. Breezy, with an east wind 14 to 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Northeast wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday Night
A chance of showers, mainly before 5am. Mostly cloudy, with a low around 60. North wind 13 to 17 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Mostly sunny, with a high near 72. North wind 14 to 17 mph.
Wednesday Night
Partly cloudy, with a low around 64. Northwest wind 6 to 8 mph becoming southwest in the evening.
Thursday
Sunny, with a high near 77. Southwest wind 10 to 16 mph.
Thursday Night
Partly cloudy, with a low around 67. Southwest wind around 17 mph.
Friday
Partly sunny, with a high near 76. Southwest wind around 15 mph.
Friday Night
A chance of showers before 1am. Mostly cloudy, with a low around 66. Southwest wind 9 to 13 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 77. North wind around 11 mph.
Saturday Night
A chance of showers. Partly cloudy, with a low around 62. Northeast wind around 9 mph becoming west after midnight. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 77. North wind around 11 mph becoming southeast in the afternoon.
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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:
11:58 am EDT Jul 6, 2026
Forecast Valid:
2pm EDT Jul 6, 2026-6pm EDT Jul 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation