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Hazardous Weather Conditions
Current conditions at
Nantucket, Nantucket Memorial Airport (KACK)
Lat: 41.25°NLon: 70.06°WElev: 46ft.
Fair
64°F
18°C
| Humidity | 75% |
| Wind Speed | NE 9 mph |
| Barometer | 30.25 in (1024.5 mb) |
| Dewpoint | 56°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 19 Aug 7:53 am EDT |
Extended Forecast for
Siasconset MA
High Surf Advisory until August 21, 08:00pm
NOW until 8:00pm Thu
High Surf Advisory
Today
High: 73 °F
Mostly Sunny
Tonight
Low: 60 °F
Partly Cloudy
Wednesday
High: 74 °F
Mostly Sunny
then Slight
Chance
ShowersWednesday Night
Low: 60 °F
Chance
ShowersThursday
High: 74 °F
Chance
ShowersThursday Night
Low: 61 °F
Slight Chance
Showers and
BreezyFriday
High: 74 °F
Mostly Sunny
and BreezyFriday Night
Low: 61 °F
Partly Cloudy
Detailed Forecast
Today
Mostly sunny, with a high near 73. East wind around 11 mph.
Tonight
Partly cloudy, with a low around 60. Southeast wind around 8 mph.
Wednesday
A slight chance of showers after 1pm. Partly sunny, with a high near 74. East wind 8 to 11 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 60. East wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers, mainly before 9am. Partly sunny, with a high near 74. East wind 14 to 16 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers before 11pm, then a slight chance of showers after 1am. Mostly cloudy, with a low around 61. Breezy, with a northeast wind 18 to 21 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 74. Breezy, with a northeast wind 20 to 22 mph, with gusts as high as 32 mph.
Friday Night
Partly cloudy, with a low around 61. Northeast wind 11 to 15 mph.
Saturday
Sunny, with a high near 76. North wind around 14 mph becoming west in the afternoon.
Saturday Night
Mostly clear, with a low around 62. Southwest wind around 10 mph.
Sunday
Mostly sunny, with a high near 78. South wind 10 to 13 mph.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 63. South wind around 10 mph. Chance of precipitation is 30%.
Monday
A chance of showers. Partly sunny, with a high near 77. South wind around 11 mph. Chance of precipitation is 40%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Siasconset MA
41.27°N 70.03°W (Elev. 52 ft)
41.27°N 70.03°W (Elev. 52 ft)
6:49 am EDT Aug 19, 2025
8am EDT Aug 19, 2025-6pm EDT Aug 25, 2025
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