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

40°F

4°C

Humidity 86%
Wind Speed S 7 mph
Barometer 30.32 in (1026.8 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 9 Jan 8:56 am EST
Extended Forecast for

South Yarmouth MA

  • Today

    Today: Patchy fog before noon. Otherwise, partly sunny, with a high near 44. South wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 44 °F

    Patchy Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Showers likely, mainly between 10pm and 2am. Patchy fog. Otherwise, cloudy, with a low around 37. South wind 9 to 16 mph becoming west after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: Rain likely, mainly after 5pm. Patchy fog after 4pm. Otherwise, cloudy, with a high near 45. Northwest wind around 6 mph becoming east in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Cloudy then
    Rain Likely
    and Patchy
    Fog

  • Saturday Night

    Saturday Night: Rain. Patchy fog before 8pm. Low around 35. East wind 6 to 8 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Rain and
    Patchy Fog

  • Sunday

    Sunday: Rain, mainly before 4pm. High near 41. West wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 41 °F

    Rain

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am, then a slight chance of snow between 1am and 3am. Partly cloudy, with a low around 27. West wind 10 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 27 °F

    Chance
    Rain/Snow

  • Monday

    Monday: Sunny, with a high near 37. West wind 10 to 15 mph, with gusts as high as 29 mph.

    High: 37 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30. West wind around 10 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 40. Southwest wind 10 to 13 mph.

    High: 40 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before noon. Otherwise, partly sunny, with a high near 44. South wind 6 to 11 mph, with gusts as high as 21 mph.
Tonight
Showers likely, mainly between 10pm and 2am. Patchy fog. Otherwise, cloudy, with a low around 37. South wind 9 to 16 mph becoming west after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely, mainly after 5pm. Patchy fog after 4pm. Otherwise, cloudy, with a high near 45. Northwest wind around 6 mph becoming east in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Rain. Patchy fog before 8pm. Low around 35. East wind 6 to 8 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Rain, mainly before 4pm. High near 41. West wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before 1am, then a slight chance of snow between 1am and 3am. Partly cloudy, with a low around 27. West wind 10 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Monday
Sunny, with a high near 37. West wind 10 to 15 mph, with gusts as high as 29 mph.
Monday Night
Partly cloudy, with a low around 30. West wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 40. Southwest wind 10 to 13 mph.
Tuesday Night
Mostly cloudy, with a low around 34. Southwest wind around 8 mph.
Wednesday
Mostly cloudy, with a high near 43. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
A chance of rain. Cloudy, with a low around 33. Southwest wind around 7 mph becoming north after midnight. Chance of precipitation is 40%.
Thursday
A chance of rain. Mostly cloudy, with a high near 39. North wind 7 to 10 mph. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
South Yarmouth MA
 41.65°N 70.2°W (Elev. 10 ft)
Last Update:
8:56 am EST Jan 9, 2026
Forecast Valid:
9am EST Jan 9, 2026-6pm EST Jan 15, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation