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

62°F

17°C

Humidity 96%
Wind Speed Calm
Barometer 30.08 in (1018.6 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 26 Aug 11:56 pm EDT
Extended Forecast for

South Yarmouth MA

  • Overnight

    Overnight: Mostly cloudy, with a low around 64. Southwest wind 3 to 5 mph.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 80. South wind 5 to 10 mph, with gusts as high as 22 mph.

    High: 80 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then a chance of showers after 2am. Mostly cloudy, with a low around 69. South wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 81. South wind 6 to 8 mph.

    High: 81 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 68. Light and variable wind becoming northwest around 6 mph after midnight.

    Low: 68 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77. North wind 7 to 9 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 79. Light southwest wind increasing to 6 to 11 mph in the morning.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. West wind around 9 mph.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 64. Southwest wind 3 to 5 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 80. South wind 5 to 10 mph, with gusts as high as 22 mph.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of showers after 2am. Mostly cloudy, with a low around 69. South wind 6 to 8 mph. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 81. South wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around 68. Light and variable wind becoming northwest around 6 mph after midnight.
Saturday
Mostly sunny, with a high near 77. North wind 7 to 9 mph.
Saturday Night
Partly cloudy, with a low around 63. Calm wind.
Sunday
Sunny, with a high near 79. Light southwest wind increasing to 6 to 11 mph in the morning.
Sunday Night
Partly cloudy, with a low around 67. West wind around 9 mph.
Monday
Mostly sunny, with a high near 79. West wind around 8 mph.
Monday Night
Mostly cloudy, with a low around 66. South wind 3 to 5 mph.
Tuesday
Partly sunny, with a high near 77. South wind 6 to 9 mph.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 66. South wind around 6 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers. Partly sunny, with a high near 78. South wind 7 to 10 mph. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Yarmouth MA
 41.67°N 70.2°W (Elev. 10 ft)
Last Update:
6:39 pm EDT Aug 26, 2026
Forecast Valid:
12am EDT Aug 27, 2026-6pm EDT Sep 2, 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