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

75°F

24°C

Humidity 88%
Wind Speed SW 5 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 3 Jul 2:56 am EDT
Extended Forecast for

Hyannis Port MA

Heat Advisory July 3, 03:13am until July 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 3, 03:13am until July 4, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Overnight

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 94. Heat index values as high as 101. West wind 7 to 13 mph.

    High: 94 °F

    Hot

  • Friday Night

    Friday Night: 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 91. West wind around 9 mph. Chance of precipitation is 30%.

    High: 91 °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: Mostly cloudy, with a low around 60. Southeast wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Cloudy

  • 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

Detailed Forecast

Overnight
Mostly clear, with a low around 74. Southwest wind around 8 mph.
Friday
Sunny and hot, with a high near 94. Heat index values as high as 101. West wind 7 to 13 mph.
Friday Night
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 91. 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
Mostly cloudy, with a low around 60. Southeast wind around 5 mph becoming calm in the evening.
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 3am, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 63. Southeast wind around 7 mph. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely before 2pm, then a chance of showers between 2pm and 5pm. Partly sunny, with a high near 72. East wind 9 to 13 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 62. East wind 6 to 9 mph. Chance of precipitation is 40%.
Wednesday
Mostly sunny, with a high near 78. Northeast wind 7 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 65. Southeast wind 5 to 7 mph becoming west after midnight.
Thursday
Sunny, with a high near 82. Southwest wind 6 to 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Hyannis Port MA
 41.64°N 70.29°W (Elev. 10 ft)
Last Update:
1:14 am EDT Jul 3, 2026
Forecast Valid:
3am EDT Jul 3, 2026-6pm EDT Jul 9, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation