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

35°F

2°C

Humidity 89%
Wind Speed E 6 mph
Barometer 30.00 in (1015.8 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 22 Mar 5:53 am EDT
Extended Forecast for

3 Miles NNE Siasconset MA

  • Today

    Today: Rain likely, mainly after 5pm. Cloudy, with a high near 45. South wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Slight Chance
    Rain then
    Rain Likely

  • Tonight

    Tonight: Rain. Low around 38. Southwest wind 10 to 13 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 38 °F

    Rain

  • Monday

    Monday: Rain likely before 2pm, then scattered showers, mainly between 2pm and 3pm. Cloudy, with a high near 39. Breezy, with a north wind 22 to 24 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 39 °F

    Rain Likely
    and Breezy

  • Monday Night

    Monday Night: A slight chance of rain and snow showers before 8pm, then a slight chance of snow showers between 8pm and 9pm. Mostly cloudy, with a low around 34. Breezy, with a north wind 16 to 20 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Isolated
    Rain/Snow and
    Breezy then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39. North wind 6 to 15 mph.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36. Southwest wind 9 to 16 mph.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 43. Southwest wind 15 to 17 mph.

    High: 43 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 39. Southwest wind 11 to 14 mph.

    Low: 39 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48. South wind 10 to 15 mph.

    High: 48 °F

    Partly Sunny

Detailed Forecast

Today
Rain likely, mainly after 5pm. Cloudy, with a high near 45. South wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain. Low around 38. Southwest wind 10 to 13 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain likely before 2pm, then scattered showers, mainly between 2pm and 3pm. Cloudy, with a high near 39. Breezy, with a north wind 22 to 24 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A slight chance of rain and snow showers before 8pm, then a slight chance of snow showers between 8pm and 9pm. Mostly cloudy, with a low around 34. Breezy, with a north wind 16 to 20 mph. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 39. North wind 6 to 15 mph.
Tuesday Night
Partly cloudy, with a low around 36. Southwest wind 9 to 16 mph.
Wednesday
Partly sunny, with a high near 43. Southwest wind 15 to 17 mph.
Wednesday Night
Mostly cloudy, with a low around 39. Southwest wind 11 to 14 mph.
Thursday
Partly sunny, with a high near 48. South wind 10 to 15 mph.
Thursday Night
A chance of rain before 8pm, then rain likely after 9pm. Cloudy, with a low around 40. Windy, with a south wind 18 to 26 mph. Chance of precipitation is 60%.
Friday
Rain likely. Partly sunny, with a high near 45. Breezy, with a west wind 17 to 22 mph becoming north in the afternoon. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 29. North wind 15 to 17 mph.
Saturday
Mostly sunny, with a high near 38. North wind 9 to 14 mph.
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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:
1:44 am EDT Mar 22, 2026
Forecast Valid:
6am EDT Mar 22, 2026-6pm EDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation