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

67°F

19°C

Humidity 91%
Wind Speed Vrbl 7 mph
Barometer 30.14 in (1020.7 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 17 Sep 6:52 pm EDT
Extended Forecast for

Harwich Port MA

  • Tonight

    Tonight: A chance of showers, mainly after 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 66. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 66 °F

    Mostly Cloudy
    then Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Patchy fog between 7am and 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71. West wind 8 to 13 mph becoming north in the afternoon.

    High: 71 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54. North wind 7 to 14 mph.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 62. Northeast wind 8 to 11 mph.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. Light southeast wind.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers, mainly after 3pm. Mostly cloudy, with a high near 67. Southeast wind 6 to 9 mph. Chance of precipitation is 30%.

    High: 67 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 9pm. Mostly cloudy, with a low around 57. Southeast wind 6 to 8 mph. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 67. Northeast wind 13 to 15 mph. Chance of precipitation is 40%.

    High: 67 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers after 3am. Mostly cloudy, with a low around 56. Northeast wind 14 to 16 mph. Chance of precipitation is 30%.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A chance of showers, mainly after 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 66. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Patchy fog between 7am and 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71. West wind 8 to 13 mph becoming north in the afternoon.
Friday Night
Partly cloudy, with a low around 54. North wind 7 to 14 mph.
Saturday
Mostly sunny, with a high near 62. Northeast wind 8 to 11 mph.
Saturday Night
Partly cloudy, with a low around 57. Light southeast wind.
Sunday
A chance of showers, mainly after 3pm. Mostly cloudy, with a high near 67. Southeast wind 6 to 9 mph. Chance of precipitation is 30%.
Sunday Night
Showers likely, mainly after 9pm. Mostly cloudy, with a low around 57. Southeast wind 6 to 8 mph. Chance of precipitation is 70%.
Monday
A chance of showers. Mostly cloudy, with a high near 67. Northeast wind 13 to 15 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers after 3am. Mostly cloudy, with a low around 56. Northeast wind 14 to 16 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers before 1pm. Partly sunny, with a high near 63. Northeast wind around 18 mph. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 56. Breezy, with a northeast wind 20 to 22 mph.
Wednesday
Mostly sunny, with a high near 63. Breezy, with a northeast wind 21 to 24 mph.
Wednesday Night
Partly cloudy, with a low around 56. Breezy, with an east wind around 22 mph.
Thursday
A chance of showers. Partly sunny, with a high near 64. Breezy, with a northeast wind around 22 mph. Chance of precipitation is 30%.
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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:
7:05 pm EDT Sep 17, 2026
Forecast Valid:
7pm EDT Sep 17, 2026-6pm EDT Sep 24, 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