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

24°F

-4°C

Humidity 71%
Wind Speed Calm
Barometer 30.36 in (1028.1 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 19 Mar 3:53 am EDT
Extended Forecast for

2 Miles ENE Siasconset MA

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 38. Southeast wind around 6 mph.

    High: 38 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 33. Light and variable wind becoming south around 5 mph after midnight.

    Low: 33 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 45. South wind 8 to 15 mph.

    High: 45 °F

    Sunny

  • Friday Night

    Friday Night: A chance of rain, mainly after 2am. Increasing clouds, with a low around 40. Breezy, with a south wind 18 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Breezy.
    Slight Chance
    Rain then
    Chance Rain

  • Saturday

    Saturday: A chance of rain, mainly before 11am. Partly sunny, with a high near 46. Southwest wind 11 to 14 mph. Chance of precipitation is 30%.

    High: 46 °F

    Chance Rain
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. West wind around 10 mph.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 46. Southwest wind 9 to 11 mph.

    High: 46 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Rain likely, mainly after 5am. Mostly cloudy, with a low around 36. Southwest wind 10 to 14 mph. Chance of precipitation is 60%.

    Low: 36 °F

    Rain Likely

  • Monday

    Monday: A chance of rain. Mostly cloudy, with a high near 42. North wind around 17 mph. Chance of precipitation is 50%.

    High: 42 °F

    Chance Rain

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 38. Southeast wind around 6 mph.
Tonight
Partly cloudy, with a low around 33. Light and variable wind becoming south around 5 mph after midnight.
Friday
Sunny, with a high near 45. South wind 8 to 15 mph.
Friday Night
A chance of rain, mainly after 2am. Increasing clouds, with a low around 40. Breezy, with a south wind 18 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of rain, mainly before 11am. Partly sunny, with a high near 46. Southwest wind 11 to 14 mph. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 38. West wind around 10 mph.
Sunday
Partly sunny, with a high near 46. Southwest wind 9 to 11 mph.
Sunday Night
Rain likely, mainly after 5am. Mostly cloudy, with a low around 36. Southwest wind 10 to 14 mph. Chance of precipitation is 60%.
Monday
A chance of rain. Mostly cloudy, with a high near 42. North wind around 17 mph. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 30. North wind around 17 mph.
Tuesday
Mostly sunny, with a high near 38. North wind 10 to 16 mph.
Tuesday Night
Partly cloudy, with a low around 32. West wind 9 to 11 mph.
Wednesday
Partly sunny, with a high near 43. Southwest wind 11 to 14 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Siasconset MA
 41.28°N 69.97°W (Elev. 56 ft)
Last Update:
3:02 am EDT Mar 19, 2026
Forecast Valid:
4am EDT Mar 19, 2026-6pm EDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation