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

80°F

27°C

Humidity 71%
Wind Speed SW 14 mph
Barometer 29.76 in (1007.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 10 Sep 1:56 pm EDT
Extended Forecast for

South Yarmouth MA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 81. Southwest wind around 15 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. Northwest wind around 9 mph.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 73. North wind 6 to 10 mph.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55. Southwest wind around 6 mph becoming light and variable in the evening.

    Low: 55 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 65. South wind around 7 mph.

    Low: 65 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly between 8am and 11am. Partly sunny, with a high near 74. South wind 9 to 11 mph. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 65. Southwest wind around 8 mph.

    Low: 65 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 73. North wind 8 to 11 mph.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 81. Southwest wind around 15 mph.
Tonight
Mostly clear, with a low around 64. Northwest wind around 9 mph.
Friday
Sunny, with a high near 73. North wind 6 to 10 mph.
Friday Night
Clear, with a low around 55. Southwest wind around 6 mph becoming light and variable in the evening.
Saturday
Sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 65. South wind around 7 mph.
Sunday
Showers likely, mainly between 8am and 11am. Partly sunny, with a high near 74. South wind 9 to 11 mph. Chance of precipitation is 70%.
Sunday Night
Mostly cloudy, with a low around 65. Southwest wind around 8 mph.
Monday
Mostly sunny, with a high near 73. North wind 8 to 11 mph.
Monday Night
Partly cloudy, with a low around 62. Northeast wind around 7 mph.
Tuesday
Sunny, with a high near 72. East wind 8 to 13 mph becoming south in the afternoon.
Tuesday Night
Mostly clear, with a low around 64. Southwest wind around 13 mph.
Wednesday
Mostly sunny, with a high near 76. Southwest wind around 14 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
South Yarmouth MA
 41.65°N 70.2°W (Elev. 10 ft)
Last Update:
12:33 pm EDT Sep 10, 2026
Forecast Valid:
2pm EDT Sep 10, 2026-6pm EDT Sep 16, 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