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

72°F

22°C

Humidity 84%
Wind Speed NA
Barometer 29.81 in (1009.3 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 23 Jun 3:50 pm EDT
Extended Forecast for

2 Miles ENE Siasconset MA

  • This Afternoon

    This Afternoon: A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a high near 70. West wind around 7 mph. Chance of precipitation is 40%.

    High: 70 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 3am, then showers likely. Patchy fog. Low around 61. North wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 79. North wind 7 to 9 mph becoming west in the afternoon.

    High: 79 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. Southwest wind 7 to 10 mph.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 73. Light west wind becoming southwest 5 to 9 mph in the morning.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 62. Southwest wind around 8 mph.

    Low: 62 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers after 2pm. Partly sunny, with a high near 71. South wind 8 to 13 mph. Chance of precipitation is 30%.

    High: 71 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 65. Southwest wind 8 to 11 mph. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Mostly cloudy, with a high near 77. Southwest wind 6 to 8 mph. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a high near 70. West wind around 7 mph. Chance of precipitation is 40%.
Tonight
Showers and possibly a thunderstorm before 3am, then showers likely. Patchy fog. Low around 61. North wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 79. North wind 7 to 9 mph becoming west in the afternoon.
Wednesday Night
Mostly clear, with a low around 64. Southwest wind 7 to 10 mph.
Thursday
Sunny, with a high near 73. Light west wind becoming southwest 5 to 9 mph in the morning.
Thursday Night
Partly cloudy, with a low around 62. Southwest wind around 8 mph.
Friday
A chance of showers after 2pm. Partly sunny, with a high near 71. South wind 8 to 13 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 65. Southwest wind 8 to 11 mph. Chance of precipitation is 40%.
Saturday
A chance of showers. Mostly cloudy, with a high near 77. Southwest wind 6 to 8 mph. Chance of precipitation is 40%.
Saturday Night
A chance of showers before 11pm. Mostly cloudy, with a low around 63. Northeast wind around 6 mph. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 76. North wind around 7 mph.
Sunday Night
Partly cloudy, with a low around 64. Southeast wind around 5 mph becoming light and variable.
Monday
Mostly sunny, with a high near 78. North wind around 6 mph becoming southwest in the afternoon.
Monday Night
Partly cloudy, with a low around 65. Southwest wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 78.
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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:
2:36 pm EDT Jun 23, 2026
Forecast Valid:
4pm EDT Jun 23, 2026-6pm EDT Jun 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation