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

Chatham, Chatham Municipal Airport (KCQX)

Lat: 41.69°NLon: 69.99°WElev: 66ft.

Overcast

78°F

26°C

Humidity 85%
Wind Speed SW 12 G 32 mph
Barometer 29.82 in (1009.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 3 Aug 2:52 pm EDT
Extended Forecast for

Harwich Port MA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Patchy fog after 5pm. Otherwise, mostly cloudy, with a high near 79. Breezy, with a southwest wind around 21 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Patchy fog before 10pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 66. Southwest wind 9 to 18 mph becoming west after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Showers
    Likely and
    Patchy Fog
    then Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. West wind 6 to 9 mph becoming southwest in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 68. Southwest wind 3 to 7 mph.

    Low: 68 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78. Light south wind increasing to 5 to 10 mph in the morning.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 70. Southwest wind around 7 mph.

    Low: 70 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Southwest wind 7 to 13 mph.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 72. Southwest wind around 10 mph.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 82. Southwest wind 9 to 14 mph.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Patchy fog after 5pm. Otherwise, mostly cloudy, with a high near 79. Breezy, with a southwest wind around 21 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Patchy fog before 10pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 66. Southwest wind 9 to 18 mph becoming west after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Mostly sunny, with a high near 78. West wind 6 to 9 mph becoming southwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 68. Southwest wind 3 to 7 mph.
Wednesday
Mostly sunny, with a high near 78. Light south wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 70. Southwest wind around 7 mph.
Thursday
Mostly sunny, with a high near 80. Southwest wind 7 to 13 mph.
Thursday Night
Partly cloudy, with a low around 72. Southwest wind around 10 mph.
Friday
Mostly sunny, with a high near 82. Southwest wind 9 to 14 mph.
Friday Night
Partly cloudy, with a low around 72. Southwest wind 8 to 11 mph.
Saturday
Mostly sunny, with a high near 81. West wind 7 to 11 mph.
Saturday Night
Partly cloudy, with a low around 72. Southwest wind 6 to 9 mph.
Sunday
Mostly sunny, with a high near 81. Southwest wind 6 to 13 mph.
Sunday Night
Partly cloudy, with a low around 71. Southwest wind 8 to 10 mph.
Monday
Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harwich Port MA
 41.67°N 70.08°W (Elev. 10 ft)
Last Update:
3:42 pm EDT Aug 3, 2026
Forecast Valid:
3pm EDT Aug 3, 2026-6pm EDT Aug 10, 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