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

81°F

27°C

Humidity 69%
Wind Speed S 7 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 20 Aug 1:56 pm EDT
Extended Forecast for

Dennis MA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. South wind around 7 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Rain, mainly after 8pm. Low around 68. West wind 5 to 9 mph becoming northeast after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Rain

  • Friday

    Friday: Rain. High near 70. Northeast wind 8 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 70 °F

    Rain

  • Friday Night

    Friday Night: Rain, mainly before 5am, then patchy drizzle with a chance of rain after 5am. Low around 68. East wind 11 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 68 °F

    Rain

  • Saturday

    Saturday: Patchy drizzle with a chance of rain before 9am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 75. East wind 7 to 11 mph. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 5am, then showers likely. Low around 68. South wind around 5 mph. Chance of precipitation is 80%.

    Low: 68 °F

    Showers

  • Sunday

    Sunday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 78. South wind 6 to 8 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers between 11pm and 3am. Mostly cloudy, with a low around 70. South wind around 7 mph. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 79. Southwest wind 7 to 11 mph.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. South wind around 7 mph.
Tonight
Rain, mainly after 8pm. Low around 68. West wind 5 to 9 mph becoming northeast after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain. High near 70. Northeast wind 8 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain, mainly before 5am, then patchy drizzle with a chance of rain after 5am. Low around 68. East wind 11 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Patchy drizzle with a chance of rain before 9am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 75. East wind 7 to 11 mph. Chance of precipitation is 60%.
Saturday Night
Showers and possibly a thunderstorm before 5am, then showers likely. Low around 68. South wind around 5 mph. Chance of precipitation is 80%.
Sunday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 78. South wind 6 to 8 mph. Chance of precipitation is 60%.
Sunday Night
A chance of showers between 11pm and 3am. Mostly cloudy, with a low around 70. South wind around 7 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 79. Southwest wind 7 to 11 mph.
Monday Night
Mostly clear, with a low around 65. West wind 7 to 9 mph.
Tuesday
Sunny, with a high near 77. Southwest wind around 9 mph.
Tuesday Night
Mostly clear, with a low around 66. West wind 6 to 8 mph.
Wednesday
Sunny, with a high near 77. 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:
Dennis MA
 41.74°N 70.21°W (Elev. 30 ft)
Last Update:
2:20 pm EDT Aug 20, 2026
Forecast Valid:
2pm EDT Aug 20, 2026-6pm EDT Aug 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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