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

69°F

21°C

Humidity 93%
Wind Speed NE 12 mph
Barometer 29.98 in (1015.3 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 21 Aug 4:53 am EDT
Extended Forecast for

2 Miles S Siasconset MA

  • Overnight

    Overnight: Showers likely. Patchy fog. Otherwise, cloudy, with a low around 69. Northeast wind around 13 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 69 °F

    Showers
    Likely and
    Patchy Fog

  • Friday

    Friday: Showers and possibly a thunderstorm before 11am, then showers likely. Patchy fog before 4pm, then patchy fog after 5pm. High near 72. Breezy, with a northeast wind 17 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: A chance of showers, mainly before 4am. Patchy fog. Otherwise, cloudy, with a low around 65. Northeast wind 14 to 16 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 65 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers before 10am, then a slight chance of showers after 5pm. Patchy fog before 11am, then patchy fog after 4pm. Otherwise, mostly cloudy, with a high near 72. Northeast wind around 9 mph becoming southwest in the afternoon. Chance of precipitation is 20%.

    High: 72 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Patchy
    Fog

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Patchy fog before 8pm. Low around 66. Southeast wind around 5 mph. Chance of precipitation is 80%.

    Low: 66 °F

    Showers and
    Patchy Fog

  • Sunday

    Sunday: Showers, mainly before 11am. High near 75. South wind 7 to 10 mph. Chance of precipitation is 80%.

    High: 75 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 68. Southwest wind 6 to 8 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 76. Southwest wind 7 to 11 mph.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. Southwest wind around 9 mph.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers likely. Patchy fog. Otherwise, cloudy, with a low around 69. Northeast wind around 13 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers and possibly a thunderstorm before 11am, then showers likely. Patchy fog before 4pm, then patchy fog after 5pm. High near 72. Breezy, with a northeast wind 17 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers, mainly before 4am. Patchy fog. Otherwise, cloudy, with a low around 65. Northeast wind 14 to 16 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of showers before 10am, then a slight chance of showers after 5pm. Patchy fog before 11am, then patchy fog after 4pm. Otherwise, mostly cloudy, with a high near 72. Northeast wind around 9 mph becoming southwest in the afternoon. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Patchy fog before 8pm. Low around 66. Southeast wind around 5 mph. Chance of precipitation is 80%.
Sunday
Showers, mainly before 11am. High near 75. South wind 7 to 10 mph. Chance of precipitation is 80%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 68. Southwest wind 6 to 8 mph. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 76. Southwest wind 7 to 11 mph.
Monday Night
Mostly clear, with a low around 65. Southwest wind around 9 mph.
Tuesday
Sunny, with a high near 75. Southwest wind 8 to 13 mph.
Tuesday Night
Mostly clear, with a low around 66. West wind 7 to 11 mph.
Wednesday
Sunny, with a high near 76. Southwest wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 67. Southwest wind 6 to 8 mph.
Thursday
A chance of showers. Partly sunny, with a high near 78. South wind 7 to 13 mph. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Siasconset MA
 41.24°N 70.01°W (Elev. 0 ft)
Last Update:
3:49 am EDT Aug 21, 2026
Forecast Valid:
5am EDT Aug 21, 2026-6pm EDT Aug 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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