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

39°F

4°C

Humidity 53%
Wind Speed SE 9 mph
Barometer 30.31 in (1026.2 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 19 Mar 12:53 pm EDT
Extended Forecast for

2 Miles ENE Siasconset MA

  • This Afternoon

    This Afternoon: Sunny, with a high near 38. South wind around 6 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 34. Southwest wind 3 to 7 mph.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 46. West wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 21 mph.

    High: 46 °F

    Sunny

  • Friday Night

    Friday Night: Rain likely, mainly after 2am. Increasing clouds, with a low around 39. South wind around 14 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Slight Chance
    Rain then
    Rain Likely

  • Saturday

    Saturday: A chance of rain before 8am. Partly sunny, with a high near 45. West wind around 10 mph becoming north in the afternoon. Chance of precipitation is 30%.

    High: 45 °F

    Chance Rain
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. North wind 6 to 8 mph becoming northwest after midnight.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 46. South wind around 10 mph.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely, mainly after 5am. Mostly cloudy, with a low around 39. South wind 9 to 11 mph. Chance of precipitation is 60%.

    Low: 39 °F

    Rain Likely

  • Monday

    Monday: A chance of rain before 2pm. Mostly cloudy, with a high near 46. North wind around 15 mph. Chance of precipitation is 40%.

    High: 46 °F

    Chance Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 38. South wind around 6 mph.
Tonight
Mostly clear, with a low around 34. Southwest wind 3 to 7 mph.
Friday
Sunny, with a high near 46. West wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Rain likely, mainly after 2am. Increasing clouds, with a low around 39. South wind around 14 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of rain before 8am. Partly sunny, with a high near 45. West wind around 10 mph becoming north in the afternoon. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 38. North wind 6 to 8 mph becoming northwest after midnight.
Sunday
Mostly cloudy, with a high near 46. South wind around 10 mph.
Sunday Night
Rain likely, mainly after 5am. Mostly cloudy, with a low around 39. South wind 9 to 11 mph. Chance of precipitation is 60%.
Monday
A chance of rain before 2pm. Mostly cloudy, with a high near 46. North wind around 15 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 31. Northwest wind around 14 mph.
Tuesday
Mostly sunny, with a high near 38. North wind 9 to 13 mph.
Tuesday Night
Mostly cloudy, with a low around 33. Southwest wind 7 to 10 mph.
Wednesday
A chance of rain. Partly sunny, with a high near 42. Southwest wind 11 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 ENE Siasconset MA
 41.28°N 69.97°W (Elev. 56 ft)
Last Update:
1:11 pm EDT Mar 19, 2026
Forecast Valid:
1pm EDT Mar 19, 2026-6pm EDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation