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

45°F

7°C

Humidity 97%
Wind Speed N 10 mph
Barometer 29.75 in (1007.3 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 23 Mar 12:53 am EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Overnight

    Overnight: Rain. Low around 40. North wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain

  • Monday

    Monday: Rain before noon, then rain showers likely between noon and 5pm, then scattered rain and snow showers after 5pm. High near 41. Breezy, with a north wind 22 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 41 °F

    Breezy. Rain
    then
    Rain/Snow
    Likely

  • Monday Night

    Monday Night: A chance of rain and snow showers before 10pm, then a slight chance of rain showers between 10pm and 11pm. Mostly cloudy, with a low around 34. Breezy, with a north wind 14 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance
    Rain/Snow and
    Breezy then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 39. North wind 7 to 15 mph.

    High: 39 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. Southwest wind 9 to 16 mph.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 44. Southwest wind 13 to 15 mph.

    High: 44 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 41. Southwest wind around 16 mph.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 48. Southwest wind 15 to 17 mph.

    High: 48 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of rain after 2am. Mostly cloudy, with a low around 41. Breezy, with a southwest wind 16 to 21 mph. Chance of precipitation is 30%.

    Low: 41 °F

    Mostly Cloudy
    then Chance
    Rain and
    Breezy

Detailed Forecast

Overnight
Rain. Low around 40. North wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain before noon, then rain showers likely between noon and 5pm, then scattered rain and snow showers after 5pm. High near 41. Breezy, with a north wind 22 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Monday Night
A chance of rain and snow showers before 10pm, then a slight chance of rain showers between 10pm and 11pm. Mostly cloudy, with a low around 34. Breezy, with a north wind 14 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 39. North wind 7 to 15 mph.
Tuesday Night
Partly cloudy, with a low around 37. Southwest wind 9 to 16 mph.
Wednesday
Mostly sunny, with a high near 44. Southwest wind 13 to 15 mph.
Wednesday Night
Mostly cloudy, with a low around 41. Southwest wind around 16 mph.
Thursday
Mostly cloudy, with a high near 48. Southwest wind 15 to 17 mph.
Thursday Night
A chance of rain after 2am. Mostly cloudy, with a low around 41. Breezy, with a southwest wind 16 to 21 mph. Chance of precipitation is 30%.
Friday
A chance of rain before 2pm. Mostly cloudy, with a high near 47. Breezy, with a southwest wind 17 to 20 mph becoming north in the afternoon. Chance of precipitation is 50%.
Friday Night
Mostly cloudy, with a low around 31. North wind 15 to 17 mph.
Saturday
Partly sunny, with a high near 37. North wind 8 to 13 mph.
Saturday Night
Partly cloudy, with a low around 32. West wind 7 to 11 mph.
Sunday
Sunny, with a high near 42. Southwest wind 11 to 13 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Siasconset MA
 41.33°N 69.98°W (Elev. 0 ft)
Last Update:
1:27 am EDT Mar 23, 2026
Forecast Valid:
1am EDT Mar 23, 2026-6pm EDT Mar 29, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation