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Hazardous Weather Conditions

Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Rain Fog/Mist

66°F

19°C

Humidity 96%
Wind Speed E 10 G 22 mph
Barometer 30.03 in (1017.1 mb)
Dewpoint 65°F (18°C)
Visibility 4.00 mi
Last update 7 Jul 4:56 am EDT
Extended Forecast for

South Yarmouth MA

Flood Watch July 7, 05:57am until July 7, 02:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 7, 05:57am until July 7, 02:00pm

    NOW until 2:00pm Tue

    Flood Watch

  • Overnight

    Low: 64 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 11am, then showers likely. Patchy fog before 9am. High near 78. East wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.

    High: 78 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers likely, mainly between 8pm and 10pm. Patchy fog before 2am. Otherwise, cloudy, with a low around 64. North wind 8 to 11 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 64 °F

    Showers
    Likely and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of showers before 9am. Mostly cloudy, with a high near 79. North wind 9 to 11 mph. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 66. Calm wind becoming southwest around 5 mph after midnight.

    Low: 66 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 86. Southwest wind 7 to 13 mph.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 71. Southwest wind around 9 mph.

    Low: 71 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers after 5pm. Mostly sunny and hot, with a high near 90. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.

    High: 90 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Patchy fog. Low around 64. East wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers and possibly a thunderstorm before 11am, then showers likely. Patchy fog before 9am. High near 78. East wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Tuesday Night
Showers likely, mainly between 8pm and 10pm. Patchy fog before 2am. Otherwise, cloudy, with a low around 64. North wind 8 to 11 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A slight chance of showers before 9am. Mostly cloudy, with a high near 79. North wind 9 to 11 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 66. Calm wind becoming southwest around 5 mph after midnight.
Thursday
Mostly sunny, with a high near 86. Southwest wind 7 to 13 mph.
Thursday Night
Mostly cloudy, with a low around 71. Southwest wind around 9 mph.
Friday
A chance of showers after 5pm. Mostly sunny and hot, with a high near 90. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 70. West wind 3 to 5 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 86. North wind 6 to 9 mph.
Saturday Night
Partly cloudy, with a low around 69. Calm wind.
Sunday
Sunny, with a high near 86. North wind 3 to 7 mph.
Sunday Night
Partly cloudy, with a low around 70. Light and variable wind becoming south around 5 mph after midnight.
Monday
A chance of showers. Mostly sunny, with a high near 88. East wind 7 to 13 mph becoming south in the afternoon. Chance of precipitation is 30%.
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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:
1:54 am EDT Jul 7, 2026
Forecast Valid:
5am EDT Jul 7, 2026-6pm EDT Jul 13, 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