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

62°F

17°C

Humidity 96%
Wind Speed Calm
Barometer 30.11 in (1019.6 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 7 Sep 11:53 pm EDT
Extended Forecast for

Siasconset MA

  • Overnight

    Overnight: Showers likely, mainly before 2am. Patchy fog before 2am. Otherwise, cloudy, with a low around 60. Northwest wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 60 °F

    Showers
    Likely and
    Patchy Fog

  • Monday

    Monday: Mostly cloudy, with a high near 70. North wind around 11 mph.

    High: 70 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 61. Northeast wind 6 to 9 mph.

    Low: 61 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70. Northeast wind around 15 mph.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 3am. Mostly cloudy, with a low around 61. Northeast wind around 14 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 70. Northeast wind around 15 mph. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Cloudy, with a low around 60. North wind around 10 mph. Chance of precipitation is 50%.

    Low: 60 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 72. North wind 9 to 11 mph.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. North wind 6 to 13 mph.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers likely, mainly before 2am. Patchy fog before 2am. Otherwise, cloudy, with a low around 60. Northwest wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly cloudy, with a high near 70. North wind around 11 mph.
Monday Night
Mostly cloudy, with a low around 61. Northeast wind 6 to 9 mph.
Tuesday
Mostly sunny, with a high near 70. Northeast wind around 15 mph.
Tuesday Night
A chance of showers, mainly after 3am. Mostly cloudy, with a low around 61. Northeast wind around 14 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 70. Northeast wind around 15 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Cloudy, with a low around 60. North wind around 10 mph. Chance of precipitation is 50%.
Thursday
Mostly sunny, with a high near 72. North wind 9 to 11 mph.
Thursday Night
Partly cloudy, with a low around 58. North wind 6 to 13 mph.
Friday
Sunny, with a high near 68. North wind around 15 mph.
Friday Night
Mostly clear, with a low around 57. Northeast wind 8 to 10 mph.
Saturday
Sunny, with a high near 67. Northeast wind around 10 mph.
Saturday Night
Partly cloudy, with a low around 58. Southeast wind around 8 mph.
Sunday
Mostly sunny, with a high near 69. East wind around 11 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Siasconset MA
 41.28°N 69.97°W (Elev. 56 ft)
Last Update:
7:13 pm EDT Sep 7, 2025
Forecast Valid:
12am EDT Sep 8, 2025-6pm EDT Sep 14, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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