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.

Fair

70°F

21°C

Humidity 90%
Wind Speed SW 5 mph
Barometer 29.90 in (1012.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 20 Aug 1:56 am EDT
Extended Forecast for

South Dennis MA

  • Overnight

    Overnight: Mostly clear, with a low around 70. Southwest wind around 6 mph.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. Southwest wind 3 to 7 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers before 11pm, then a slight chance of showers after 3am. Mostly cloudy, with a low around 67. Light and variable wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 67 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, mainly between 7am and noon. Partly sunny, with a high near 78. North wind 6 to 8 mph becoming east in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 78 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 65. East wind around 5 mph. Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely. Mostly cloudy, with a high near 79. Southeast wind 8 to 10 mph. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely. Mostly cloudy, with a low around 67. East wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 70%.

    Low: 67 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 5pm. Mostly cloudy, with a high near 82. South wind 5 to 9 mph. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers between 10pm and midnight. Mostly cloudy, with a low around 68. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 70. Southwest wind around 6 mph.
Thursday
Sunny, with a high near 83. Southwest wind 3 to 7 mph.
Thursday Night
A chance of showers before 11pm, then a slight chance of showers after 3am. Mostly cloudy, with a low around 67. Light and variable wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers, mainly between 7am and noon. Partly sunny, with a high near 78. North wind 6 to 8 mph becoming east in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers. Mostly cloudy, with a low around 65. East wind around 5 mph. Chance of precipitation is 50%.
Saturday
Showers likely. Mostly cloudy, with a high near 79. Southeast wind 8 to 10 mph. Chance of precipitation is 60%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 67. East wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 70%.
Sunday
A chance of showers before 5pm. Mostly cloudy, with a high near 82. South wind 5 to 9 mph. Chance of precipitation is 50%.
Sunday Night
A chance of showers between 10pm and midnight. Mostly cloudy, with a low around 68. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 83. Southwest wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 64. West wind 5 to 7 mph.
Tuesday
Sunny, with a high near 79. Southwest wind around 8 mph.
Tuesday Night
Mostly clear, with a low around 64. West wind around 6 mph.
Wednesday
Sunny, with a high near 80. West wind 6 to 8 mph becoming south in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Dennis MA
 41.69°N 70.16°W (Elev. 7 ft)
Last Update:
9:29 pm EDT Aug 19, 2026
Forecast Valid:
2am EDT Aug 20, 2026-6pm EDT Aug 26, 2026
 
Forecast Discussion
 
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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