National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Nantucket, Nantucket Memorial Airport (KACK)

Lat: 41.25°NLon: 70.06°WElev: 46ft.

Fair

63°F

17°C

Humidity 73%
Wind Speed N 15 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 19 Sep 1:53 am EDT
Extended Forecast for

2 Miles ESE Siasconset MA

  • Overnight

    Overnight: Mostly cloudy, with a low around 57. North wind around 17 mph, with gusts as high as 29 mph.

    Low: 57 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 63. Northeast wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 63 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. Northeast wind around 7 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers after 3pm. Mostly cloudy, with a high near 66. Southeast wind 10 to 13 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers before 11pm, then showers and possibly a thunderstorm between 11pm and 2am, then showers likely after 2am. Patchy fog before 9pm. Low around 59. Southeast wind 9 to 11 mph. Chance of precipitation is 90%.

    Low: 59 °F

    Showers and
    Patchy Fog

  • Monday

    Monday: Showers likely before 1pm, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 65. Breezy, with a northeast wind 18 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 60%.

    High: 65 °F

    Breezy.
    Showers
    Likely then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 57. Northeast wind 14 to 17 mph.

    Low: 57 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 63. Breezy, with a northeast wind 18 to 20 mph.

    High: 63 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55. Breezy, with a northeast wind around 21 mph.

    Low: 55 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 57. North wind around 17 mph, with gusts as high as 29 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 63. Northeast wind 10 to 15 mph, with gusts as high as 26 mph.
Saturday Night
Partly cloudy, with a low around 57. Northeast wind around 7 mph.
Sunday
A chance of showers after 3pm. Mostly cloudy, with a high near 66. Southeast wind 10 to 13 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Showers before 11pm, then showers and possibly a thunderstorm between 11pm and 2am, then showers likely after 2am. Patchy fog before 9pm. Low around 59. Southeast wind 9 to 11 mph. Chance of precipitation is 90%.
Monday
Showers likely before 1pm, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 65. Breezy, with a northeast wind 18 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 57. Northeast wind 14 to 17 mph.
Tuesday
Mostly cloudy, with a high near 63. Breezy, with a northeast wind 18 to 20 mph.
Tuesday Night
Mostly cloudy, with a low around 55. Breezy, with a northeast wind around 21 mph.
Wednesday
Partly sunny, with a high near 63. Breezy, with a northeast wind 22 to 24 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 56. Windy, with a northeast wind 24 to 28 mph. Chance of precipitation is 30%.
Thursday
A chance of showers. Mostly cloudy, with a high near 64. Windy, with a northeast wind 23 to 31 mph. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 56. Windy, with a northeast wind 26 to 29 mph. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly cloudy, with a high near 64. Windy, with a north wind 25 to 31 mph. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Siasconset MA
 41.26°N 69.97°W (Elev. 39 ft)
Last Update:
2:36 am EDT Sep 19, 2026
Forecast Valid:
2am EDT Sep 19, 2026-6pm EDT Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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