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.

Overcast

60°F

16°C

Humidity 93%
Wind Speed S 9 G 18 mph
Barometer 29.91 in (1013.0 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 13 Oct 6:56 pm EDT
Extended Forecast for

South Yarmouth MA

  • Tonight

    Tonight: A chance of showers, with thunderstorms also possible after 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 60. Southwest wind 9 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Patchy fog before 10am. Otherwise, increasing clouds, with a high near 73. Southwest wind around 10 mph, with gusts as high as 23 mph.

    High: 73 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50. Northwest wind 7 to 9 mph, with gusts as high as 21 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 58. North wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 58 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46. Calm wind becoming southeast around 5 mph after midnight.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Showers, with thunderstorms also possible after 5pm. High near 68. South wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.

    High: 68 °F

    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 43. Breezy, with a west wind 22 to 24 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely and
    Breezy

  • Saturday

    Saturday: A chance of showers before 9am. Mostly sunny, with a high near 52. Breezy, with a northwest wind 22 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.

    High: 52 °F

    Breezy.
    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36. Northwest wind 11 to 17 mph, with gusts as high as 29 mph.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers, with thunderstorms also possible after 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 60. Southwest wind 9 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Patchy fog before 10am. Otherwise, increasing clouds, with a high near 73. Southwest wind around 10 mph, with gusts as high as 23 mph.
Wednesday Night
Mostly clear, with a low around 50. Northwest wind 7 to 9 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 58. North wind 9 to 11 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 46. Calm wind becoming southeast around 5 mph after midnight.
Friday
Showers, with thunderstorms also possible after 5pm. High near 68. South wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
Friday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 43. Breezy, with a west wind 22 to 24 mph. Chance of precipitation is 70%.
Saturday
A chance of showers before 9am. Mostly sunny, with a high near 52. Breezy, with a northwest wind 22 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.
Saturday Night
Mostly clear, with a low around 36. Northwest wind 11 to 17 mph, with gusts as high as 29 mph.
Sunday
Sunny, with a high near 56. West wind 11 to 13 mph.
Sunday Night
Mostly clear, with a low around 43. West wind 5 to 7 mph.
Monday
Sunny, with a high near 61. Southwest wind 7 to 15 mph.
Monday Night
Partly cloudy, with a low around 48. Southwest wind 7 to 9 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 62. West wind 7 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
South Yarmouth MA
 41.67°N 70.2°W (Elev. 10 ft)
Last Update:
3:30 pm EDT Oct 13, 2026
Forecast Valid:
7pm EDT Oct 13, 2026-6pm EDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation