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

38°F

3°C

Humidity 97%
Wind Speed W 3 mph
Barometer 29.62 in (1003.1 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 11 Jan 4:56 pm EST
Extended Forecast for

South Yarmouth MA

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 25. West wind 13 to 18 mph, with gusts as high as 37 mph.

    Low: 25 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 37. West wind 10 to 16 mph, with gusts as high as 31 mph.

    High: 37 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29. West wind 6 to 9 mph.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 41. Southwest wind 6 to 8 mph.

    High: 41 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. South wind 5 to 8 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain after noon. Mostly cloudy, with a high near 45. Southwest wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 45 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain. Cloudy, with a low around 35. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 35 °F

    Chance Rain

  • Thursday

    Thursday: A chance of rain. Mostly cloudy, with a high near 43. Southwest wind 3 to 8 mph. Chance of precipitation is 40%.

    High: 43 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain likely before 1am, then snow likely. Mostly cloudy, with a low around 24. North wind 6 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 24 °F

    Rain Likely
    then
    Rain/Snow
    Likely

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 25. West wind 13 to 18 mph, with gusts as high as 37 mph.
Monday
Mostly sunny, with a high near 37. West wind 10 to 16 mph, with gusts as high as 31 mph.
Monday Night
Partly cloudy, with a low around 29. West wind 6 to 9 mph.
Tuesday
Sunny, with a high near 41. Southwest wind 6 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 33. South wind 5 to 8 mph, with gusts as high as 21 mph.
Wednesday
A slight chance of rain after noon. Mostly cloudy, with a high near 45. Southwest wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of rain. Cloudy, with a low around 35. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Thursday
A chance of rain. Mostly cloudy, with a high near 43. Southwest wind 3 to 8 mph. Chance of precipitation is 40%.
Thursday Night
Rain likely before 1am, then snow likely. Mostly cloudy, with a low around 24. North wind 6 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Friday
A chance of snow before 2pm. Partly sunny, with a high near 36. North wind 9 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Friday Night
Partly cloudy, with a low around 24. West wind around 6 mph.
Saturday
Mostly sunny, with a high near 37. West wind 6 to 9 mph.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Southwest wind around 6 mph. Chance of precipitation is 30%.
Sunday
A chance of rain. Mostly cloudy, with a high near 39. South wind 6 to 10 mph. Chance of precipitation is 40%.
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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:
1:30 pm EST Jan 11, 2026
Forecast Valid:
6pm EST Jan 11, 2026-6pm EST Jan 18, 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