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

71°F

22°C

Humidity 94%
Wind Speed SW 8 G 18 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 14 Jul 8:52 pm EDT
Extended Forecast for

Harwich Port MA

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 5am. Patchy fog. Otherwise, mostly cloudy, with a low around 69. Southwest wind around 7 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Patchy fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 80. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers and
    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 70. Southwest wind around 7 mph.

    Low: 70 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Partly sunny, with a high near 82. Southwest wind 6 to 10 mph.

    High: 82 °F

    Partly Sunny

  • Wednesday Night

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

    Low: 71 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before noon. Partly sunny, with a high near 82. Southwest wind 9 to 14 mph. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms then
    Partly 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 84. West wind 8 to 11 mph.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 68. West wind around 6 mph becoming north after midnight.

    Low: 68 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly after 5am. Patchy fog. Otherwise, mostly cloudy, with a low around 69. Southwest wind around 7 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Patchy fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 80. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.
Tuesday Night
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 70. Southwest wind around 7 mph.
Wednesday
Partly sunny, with a high near 82. Southwest wind 6 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 71. Southwest wind around 9 mph.
Thursday
A slight chance of showers and thunderstorms before noon. Partly sunny, with a high near 82. Southwest wind 9 to 14 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 72. Southwest wind around 10 mph.
Friday
Mostly sunny, with a high near 84. West wind 8 to 11 mph.
Friday Night
Mostly cloudy, with a low around 68. West wind around 6 mph becoming north after midnight.
Saturday
Mostly sunny, with a high near 79. North wind around 8 mph.
Saturday Night
Partly cloudy, with a low around 67. Southeast wind around 5 mph becoming light and variable after midnight.
Sunday
Partly sunny, with a high near 79. South wind 5 to 9 mph.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 68. South wind around 7 mph. Chance of precipitation is 30%.
Monday
A chance of showers. Mostly sunny, with a high near 80. West wind 7 to 10 mph becoming north in the afternoon. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Harwich Port MA
 41.67°N 70.08°W (Elev. 10 ft)
Last Update:
2:03 pm EDT Jul 14, 2025
Forecast Valid:
9pm EDT Jul 14, 2025-6pm EDT Jul 21, 2025
 
Forecast Discussion
 
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Additional Resources

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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