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

53°F

12°C

Humidity 69%
Wind Speed SW 8 G 18 mph
Barometer 30.10 in (1019.4 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 13 May 6:52 am EDT
Extended Forecast for

South Harwich MA

  • Today

    Today: Partly sunny, with a high near 63. South wind 7 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. South wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 53 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 10am. High near 62. East wind 11 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 62 °F

    Showers

  • Thursday Night

    Thursday Night: Showers, with thunderstorms also possible after 2am. Patchy fog before 9pm. Low around 50. East wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Showers and
    Patchy Fog

  • Friday

    Friday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 57. East wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 57 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 51. West wind around 6 mph. Chance of precipitation is 30%.

    Low: 51 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 68. Southwest wind 7 to 14 mph, with gusts as high as 24 mph.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. Southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 69. Southwest wind 8 to 10 mph.

    High: 69 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 63. South wind 7 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 53. South wind 9 to 11 mph, with gusts as high as 22 mph.
Thursday
Showers, mainly after 10am. High near 62. East wind 11 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
Showers, with thunderstorms also possible after 2am. Patchy fog before 9pm. Low around 50. East wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 57. East wind 5 to 10 mph. Chance of precipitation is 70%.
Friday Night
A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 51. West wind around 6 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 68. Southwest wind 7 to 14 mph, with gusts as high as 24 mph.
Saturday Night
Mostly clear, with a low around 55. Southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 69. Southwest wind 8 to 10 mph.
Sunday Night
Mostly clear, with a low around 53. West wind around 5 mph.
Monday
Mostly sunny, with a high near 65. Light and variable wind becoming east 5 to 7 mph in the morning.
Monday Night
Mostly cloudy, with a low around 53. South wind around 5 mph.
Tuesday
Partly sunny, with a high near 67. South wind 6 to 14 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:
5:28 am EDT May 13, 2026
Forecast Valid:
7am EDT May 13, 2026-6pm EDT May 19, 2026
 
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