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.

Light Rain

66°F

19°C

Humidity 87%
Wind Speed NE 18 G 32 mph
Barometer 29.95 in (1014.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 18 Aug 2:56 am EDT
Extended Forecast for

South Yarmouth MA

  • Overnight

    Overnight: Cloudy, with a low around 62. North wind around 17 mph, with gusts as high as 32 mph.

    Low: 62 °F

    Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 71. North wind 14 to 16 mph, with gusts as high as 31 mph.

    High: 71 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Northeast wind around 5 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. Northeast wind 6 to 8 mph.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54. Southeast wind around 5 mph becoming calm after midnight.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75. Southeast wind 5 to 10 mph.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60. East wind around 7 mph.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77. Northeast wind 9 to 14 mph.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 61. Northeast wind around 15 mph.

    Low: 61 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 62. North wind around 17 mph, with gusts as high as 32 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 71. North wind 14 to 16 mph, with gusts as high as 31 mph.
Monday Night
Mostly clear, with a low around 50. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 75. Northeast wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 54. Southeast wind around 5 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 75. Southeast wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 60. East wind around 7 mph.
Thursday
Mostly sunny, with a high near 77. Northeast wind 9 to 14 mph.
Thursday Night
Mostly cloudy, with a low around 61. Northeast wind around 15 mph.
Friday
Mostly sunny, with a high near 76. North wind around 16 mph, with gusts as high as 28 mph.
Friday Night
Mostly clear, with a low around 62. Northeast wind 8 to 10 mph becoming southwest in the evening.
Saturday
Sunny, with a high near 79. South wind 9 to 13 mph.
Saturday Night
Partly cloudy, with a low around 64. South wind around 10 mph.
Sunday
Mostly sunny, with a high near 80. South wind 10 to 14 mph.
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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:
2:39 am EDT Aug 18, 2025
Forecast Valid:
3am EDT Aug 18, 2025-6pm EDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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