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.

Fog/Mist

69°F

21°C

Humidity 96%
Wind Speed SW 6 mph
Barometer 30.07 in (1018.1 mb)
Dewpoint 68°F (20°C)
Visibility 4.00 mi
Last update 15 Jul 11:53 pm EDT
Extended Forecast for

4 Miles N Siasconset MA

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 71. Southwest wind around 8 mph.

    Low: 71 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog between 4pm and 5pm. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Southwest wind 7 to 10 mph.

    High: 78 °F

    Patchy Fog

  • Wednesday Night

    Wednesday Night: Patchy fog. Otherwise, mostly cloudy, with a low around 72. Southwest wind 9 to 11 mph.

    Low: 72 °F

    Patchy Fog

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 9am, then a slight chance of showers after 1pm. Patchy fog before 9am. High near 78. Southwest wind 14 to 17 mph. Chance of precipitation is 80%.

    High: 78 °F

    Showers and
    Patchy Fog
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 72. Southwest wind around 16 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 79. West wind around 14 mph becoming north in the afternoon.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 68. North wind around 9 mph.

    Low: 68 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74. Northeast wind around 10 mph becoming east in the afternoon.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. South wind 7 to 9 mph.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 71. Southwest wind around 8 mph.
Wednesday
Patchy fog between 4pm and 5pm. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Southwest wind 7 to 10 mph.
Wednesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 72. Southwest wind 9 to 11 mph.
Thursday
Showers and possibly a thunderstorm before 9am, then a slight chance of showers after 1pm. Patchy fog before 9am. High near 78. Southwest wind 14 to 17 mph. Chance of precipitation is 80%.
Thursday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 72. Southwest wind around 16 mph. Chance of precipitation is 20%.
Friday
Sunny, with a high near 79. West wind around 14 mph becoming north in the afternoon.
Friday Night
Partly cloudy, with a low around 68. North wind around 9 mph.
Saturday
Sunny, with a high near 74. Northeast wind around 10 mph becoming east in the afternoon.
Saturday Night
Partly cloudy, with a low around 68. South wind 7 to 9 mph.
Sunday
A chance of showers after 9am. Partly sunny, with a high near 76. South wind 11 to 14 mph. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 67. South wind 9 to 11 mph becoming west after midnight. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 75. Northeast wind 11 to 13 mph.
Monday Night
Partly cloudy, with a low around 68. East wind around 9 mph.
Tuesday
Mostly sunny, with a high near 74. East wind around 11 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Siasconset MA
 41.33°N 69.98°W (Elev. 0 ft)
Last Update:
12:11 am EDT Jul 16, 2025
Forecast Valid:
12am EDT Jul 16, 2025-6pm EDT Jul 22, 2025
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation