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.

Fair

63°F

17°C

Humidity 97%
Wind Speed Calm
Barometer 30.11 in (1019.6 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 5 Aug 2:52 am EDT
Extended Forecast for

South Harwich MA

  • Overnight

    Overnight: Mostly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 71. Southwest wind around 8 mph.

    Low: 71 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 79. Southwest wind 6 to 13 mph.

    High: 79 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 72. Southwest wind 8 to 10 mph.

    Low: 72 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 80. Southwest wind 8 to 13 mph.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72. Southwest wind 9 to 11 mph.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 80. Southwest wind 8 to 15 mph.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72. Southwest wind 9 to 13 mph.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 68. Calm wind.
Wednesday
Mostly sunny, with a high near 77. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 71. Southwest wind around 8 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 79. Southwest wind 6 to 13 mph.
Thursday Night
Mostly cloudy, with a low around 72. Southwest wind 8 to 10 mph.
Friday
Sunny, with a high near 80. Southwest wind 8 to 13 mph.
Friday Night
Partly cloudy, with a low around 72. Southwest wind 9 to 11 mph.
Saturday
Mostly sunny, with a high near 80. Southwest wind 8 to 15 mph.
Saturday Night
Partly cloudy, with a low around 72. Southwest wind 9 to 13 mph.
Sunday
Mostly sunny, with a high near 80. Southwest wind 9 to 14 mph.
Sunday Night
Partly cloudy, with a low around 71. West wind 8 to 11 mph.
Monday
Sunny, with a high near 80. Southwest wind 7 to 14 mph.
Monday Night
Partly cloudy, with a low around 71. West wind 8 to 11 mph.
Tuesday
Mostly sunny, with a high near 80. Southwest wind 9 to 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Harwich MA
 41.67°N 70.05°W (Elev. 10 ft)
Last Update:
1:06 am EDT Aug 5, 2026
Forecast Valid:
3am EDT Aug 5, 2026-6pm EDT Aug 11, 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