National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Light Rain

62°F

17°C

Humidity 84%
Wind Speed E 5 mph
Barometer 30.06 in (1018.0 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 1 Sep 6:56 pm EDT
Extended Forecast for

South Dennis MA

  • Tonight

    Tonight: A chance of showers, mainly before 10pm. The rain could be heavy at times. Mostly cloudy, with a low around 60. East wind 6 to 8 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Heavy Rain
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71. East wind around 10 mph.

    High: 71 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly after 5am. Mostly cloudy, with a low around 61. East wind around 6 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 2pm. Patchy fog before 9am. High near 77. Southeast wind 7 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 65. Southwest wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 78. Northwest wind 5 to 8 mph.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. Calm wind becoming northwest 5 to 7 mph after midnight.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 72. North wind 9 to 11 mph.

    High: 72 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60. North wind 7 to 10 mph.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers, mainly before 10pm. The rain could be heavy at times. Mostly cloudy, with a low around 60. East wind 6 to 8 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Mostly sunny, with a high near 71. East wind around 10 mph.
Wednesday Night
A chance of showers, mainly after 5am. Mostly cloudy, with a low around 61. East wind around 6 mph. Chance of precipitation is 30%.
Thursday
Showers, with thunderstorms also possible after 2pm. Patchy fog before 9am. High near 77. Southeast wind 7 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 65. Southwest wind 5 to 7 mph. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 78. Northwest wind 5 to 8 mph.
Friday Night
Partly cloudy, with a low around 61. Calm wind becoming northwest 5 to 7 mph after midnight.
Saturday
Sunny, with a high near 72. North wind 9 to 11 mph.
Saturday Night
Partly cloudy, with a low around 60. North wind 7 to 10 mph.
Sunday
Mostly sunny, with a high near 72. North wind 11 to 14 mph.
Sunday Night
Mostly clear, with a low around 59. Light and variable wind becoming northwest around 5 mph after midnight.
Labor Day
Sunny, with a high near 74. Southwest wind 6 to 8 mph.
Monday Night
Partly cloudy, with a low around 61. Southwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 74. West wind 7 to 10 mph becoming northeast in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Dennis MA
 41.71°N 70.16°W (Elev. 49 ft)
Last Update:
4:11 pm EDT Sep 1, 2026
Forecast Valid:
7pm EDT Sep 1, 2026-6pm EDT Sep 8, 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