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

44°F

7°C

Humidity 89%
Wind Speed S 16 mph
Barometer 29.89 in (1012.3 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 20 Mar 10:53 pm EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Tonight

    Tonight: Rain. Patchy fog. Low around 40. Breezy, with a south wind around 21 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Rain and
    Patchy Fog

  • Saturday

    Saturday: A chance of rain before 8am. Patchy fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 44. West wind 13 to 15 mph becoming north in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Chance Rain
    and Patchy
    Fog then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 39. North wind 5 to 7 mph becoming southeast after midnight.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of rain, mainly after 4pm. Mostly cloudy, with a high near 46. South wind 10 to 17 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 10pm. Cloudy, with a low around 38. Southwest wind 11 to 14 mph becoming north after midnight. Chance of precipitation is 60%.

    Low: 38 °F

    Rain Likely

  • Monday

    Monday: A chance of rain, mainly before 4pm. Mostly cloudy, with a high near 42. Breezy, with a north wind 18 to 21 mph. Chance of precipitation is 50%.

    High: 42 °F

    Chance Rain
    and Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. North wind around 18 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39. North wind 8 to 17 mph.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35. Southwest wind 7 to 14 mph.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain. Patchy fog. Low around 40. Breezy, with a south wind around 21 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A chance of rain before 8am. Patchy fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 44. West wind 13 to 15 mph becoming north in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Increasing clouds, with a low around 39. North wind 5 to 7 mph becoming southeast after midnight.
Sunday
A chance of rain, mainly after 4pm. Mostly cloudy, with a high near 46. South wind 10 to 17 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain likely, mainly after 10pm. Cloudy, with a low around 38. Southwest wind 11 to 14 mph becoming north after midnight. Chance of precipitation is 60%.
Monday
A chance of rain, mainly before 4pm. Mostly cloudy, with a high near 42. Breezy, with a north wind 18 to 21 mph. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 33. North wind around 18 mph.
Tuesday
Mostly sunny, with a high near 39. North wind 8 to 17 mph.
Tuesday Night
Partly cloudy, with a low around 35. Southwest wind 7 to 14 mph.
Wednesday
A chance of rain after 9am. Mostly cloudy, with a high near 43. Southwest wind 16 to 18 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 34. Northwest wind 14 to 16 mph.
Thursday
Mostly sunny, with a high near 44. Northwest wind 11 to 14 mph becoming southwest in the morning.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 37. Breezy, with a south wind 16 to 23 mph. Chance of precipitation is 30%.
Friday
A chance of rain. Mostly cloudy, with a high near 46. Breezy, with a west wind 18 to 21 mph. Chance of precipitation is 50%.
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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:
1:08 pm EDT Mar 20, 2026
Forecast Valid:
11pm EDT Mar 20, 2026-6pm EDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation