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.

A Few Clouds

69°F

21°C

Humidity 90%
Wind Speed SW 6 mph
Barometer 30.26 in (1024.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 17 Sep 7:56 am EDT
Extended Forecast for

South Dennis MA

  • Today

    Today: Mostly sunny, with a high near 75. Light southwest wind becoming south 5 to 9 mph in the morning.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers likely, mainly after 4am. Increasing clouds, with a low around 63. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 63 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: A chance of showers before 8am. Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 73. West wind 9 to 13 mph becoming north in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. North wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 66. Northeast wind 6 to 10 mph.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 69. Southeast wind 6 to 10 mph. Chance of precipitation is 60%.

    High: 69 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 55. South wind 7 to 10 mph becoming north after midnight. Chance of precipitation is 70%.

    Low: 55 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers before 10am. Mostly cloudy, with a high near 68. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers then
    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 75. Light southwest wind becoming south 5 to 9 mph in the morning.
Tonight
Showers likely, mainly after 4am. Increasing clouds, with a low around 63. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers before 8am. Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 73. West wind 9 to 13 mph becoming north in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Partly cloudy, with a low around 53. North wind 7 to 11 mph, with gusts as high as 21 mph.
Saturday
Mostly sunny, with a high near 66. Northeast wind 6 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 49. Calm wind.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 69. Southeast wind 6 to 10 mph. Chance of precipitation is 60%.
Sunday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 55. South wind 7 to 10 mph becoming north after midnight. Chance of precipitation is 70%.
Monday
A chance of showers before 10am. Mostly cloudy, with a high near 68. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 54. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 67. Northeast wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 54. Northeast wind 10 to 13 mph.
Wednesday
Mostly sunny, with a high near 67. East wind around 15 mph, with gusts as high as 26 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
South Dennis MA
 41.69°N 70.16°W (Elev. 7 ft)
Last Update:
3:30 am EDT Sep 17, 2026
Forecast Valid:
8am EDT Sep 17, 2026-6pm EDT Sep 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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