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

66°F

19°C

Humidity 96%
Wind Speed S 7 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 27 Aug 2:53 am EDT
Extended Forecast for

2 Miles ESE Siasconset MA

  • Overnight

    Overnight: Mostly cloudy, with a low around 66. Southwest wind around 6 mph.

    Low: 66 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77. South wind 7 to 11 mph.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 68. South wind around 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A chance of showers, mainly before 10am. Partly sunny, with a high near 76. South wind 7 to 9 mph. Chance of precipitation is 30%.

    High: 76 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 67. Southwest wind around 6 mph.

    Low: 67 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73. North wind 8 to 11 mph.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 66. Light and variable wind.

    Low: 66 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 76. Southwest wind 5 to 11 mph.

    High: 76 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 5am. Partly cloudy, with a low around 67. Southwest wind around 11 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 66. Southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 77. South wind 7 to 11 mph.
Thursday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 68. South wind around 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers, mainly before 10am. Partly sunny, with a high near 76. South wind 7 to 9 mph. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 67. Southwest wind around 6 mph.
Saturday
Partly sunny, with a high near 73. North wind 8 to 11 mph.
Saturday Night
Mostly cloudy, with a low around 66. Light and variable wind.
Sunday
Mostly sunny, with a high near 76. Southwest wind 5 to 11 mph.
Sunday Night
A chance of showers after 5am. Partly cloudy, with a low around 67. Southwest wind around 11 mph. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 76. West wind 11 to 13 mph becoming north in the afternoon.
Monday Night
Mostly cloudy, with a low around 65. Southeast wind around 7 mph.
Tuesday
Partly sunny, with a high near 73. East wind 8 to 11 mph.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 65. East wind around 9 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers. Partly sunny, with a high near 74. Southeast wind 9 to 13 mph. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Siasconset MA
 41.26°N 69.97°W (Elev. 39 ft)
Last Update:
2:29 am EDT Aug 27, 2026
Forecast Valid:
3am EDT Aug 27, 2026-6pm EDT Sep 2, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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