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

40°F

4°C

Humidity 68%
Wind Speed W 6 mph
Barometer 30.11 in (1019.6 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 20 Apr 6:53 am EDT
Extended Forecast for

2 Miles ENE Siasconset MA

  • Today

    Today: Increasing clouds, with a high near 50. West wind 9 to 13 mph.

    High: 50 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A slight chance of rain before 3am. Mostly cloudy, with a low around 37. West wind 7 to 15 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 37 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 46. North wind 7 to 10 mph.

    High: 46 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38. Light and variable wind becoming southwest 5 to 7 mph after midnight.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, mainly between 11am and noon. Mostly cloudy, with a high near 48. South wind 8 to 13 mph. Chance of precipitation is 30%.

    High: 48 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42. East wind around 8 mph.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 51. Northeast wind 6 to 8 mph.

    High: 51 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43. West wind 5 to 7 mph.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 50. North wind around 9 mph.

    High: 50 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 50. West wind 9 to 13 mph.
Tonight
A slight chance of rain before 3am. Mostly cloudy, with a low around 37. West wind 7 to 15 mph becoming north after midnight. Chance of precipitation is 20%.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 46. North wind 7 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 38. Light and variable wind becoming southwest 5 to 7 mph after midnight.
Wednesday
A chance of showers, mainly between 11am and noon. Mostly cloudy, with a high near 48. South wind 8 to 13 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 42. East wind around 8 mph.
Thursday
Partly sunny, with a high near 51. Northeast wind 6 to 8 mph.
Thursday Night
Partly cloudy, with a low around 43. West wind 5 to 7 mph.
Friday
Mostly sunny, with a high near 50. North wind around 9 mph.
Friday Night
Partly cloudy, with a low around 42. North wind around 6 mph.
Saturday
Mostly sunny, with a high near 49. North wind around 9 mph.
Saturday Night
Mostly cloudy, with a low around 42. East wind around 6 mph.
Sunday
A chance of showers. Partly sunny, with a high near 51. East wind around 9 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:
2:29 am EDT Apr 20, 2026
Forecast Valid:
7am EDT Apr 20, 2026-6pm EDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation