National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Fair

79°F

26°C

Humidity 74%
Wind Speed W 7 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 3 Jul 4:56 am EDT
Extended Forecast for

Hyannis Port MA

Heat Advisory July 3, 05:26am until July 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 3, 05:26am until July 4, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Today

    High: 94 °F

    Hot

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 4am. Partly cloudy, with a low around 73. Southwest wind 6 to 9 mph. Chance of precipitation is 40%.

    Low: 73 °F

    Scattered
    T-storms

  • Independence Day

    Independence Day: Isolated showers and thunderstorms before 10am, then scattered showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. West wind around 9 mph. Chance of precipitation is 30%.

    High: 92 °F

    Scattered
    T-storms

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 67. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 40%.

    Low: 67 °F

    Scattered
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 81. North wind around 6 mph becoming south in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 60. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 60 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A chance of showers after 9am. Partly sunny, with a high near 74. Southeast wind 5 to 9 mph. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers before 2am, then a chance of showers and thunderstorms between 2am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 65. Southeast wind around 9 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny and hot, with a high near 94. Heat index values as high as 101. West wind 6 to 13 mph.
Tonight
Scattered showers and thunderstorms, mainly before 4am. Partly cloudy, with a low around 73. Southwest wind 6 to 9 mph. Chance of precipitation is 40%.
Independence Day
Isolated showers and thunderstorms before 10am, then scattered showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. West wind around 9 mph. Chance of precipitation is 30%.
Saturday Night
Scattered showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 67. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 81. North wind around 6 mph becoming south in the afternoon.
Sunday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 60. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Monday
A chance of showers after 9am. Partly sunny, with a high near 74. Southeast wind 5 to 9 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers before 2am, then a chance of showers and thunderstorms between 2am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 65. Southeast wind around 9 mph. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 2pm, then a chance of showers after 2pm. Partly sunny, with a high near 76. East wind 10 to 13 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 65. Northeast wind 8 to 10 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly sunny, with a high near 77. Northeast wind around 9 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 65. Southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 81. Southwest wind 5 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Hyannis Port MA
 41.64°N 70.29°W (Elev. 10 ft)
Last Update:
3:11 am EDT Jul 3, 2026
Forecast Valid:
5am EDT Jul 3, 2026-6pm EDT Jul 9, 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