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.

Fog/Mist

40°F

4°C

Humidity 100%
Wind Speed SW 6 mph
Barometer 30.03 in (1017.1 mb)
Dewpoint 40°F (4°C)
Visibility 1.00 mi
Wind Chill36°F (2°C)
Last update 10 Mar 9:52 pm EDT
Extended Forecast for

South Harwich MA

  • Tonight

    Tonight: Patchy fog. Otherwise, mostly cloudy, with a low around 36. Southwest wind around 6 mph.

    Low: 36 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before noon. Otherwise, mostly cloudy, with a high near 44. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 44 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain, mainly after 3am. Patchy fog. Otherwise, cloudy, with a low around 41. South wind 9 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    Low: 41 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday

    Thursday: Rain likely, mainly after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 49. Southwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Chance Rain
    and Patchy
    Fog then Rain
    Likely

  • Thursday Night

    Thursday Night: A slight chance of rain before 9pm. Partly cloudy, with a low around 29. West wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 29 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 42. West wind 7 to 10 mph becoming southwest in the afternoon.

    High: 42 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of rain after 11pm. Mostly cloudy, with a low around 33. South wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    Low: 33 °F

    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 44. West wind 15 to 17 mph, with gusts as high as 28 mph.

    High: 44 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. Northwest wind 8 to 10 mph.

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog. Otherwise, mostly cloudy, with a low around 36. Southwest wind around 6 mph.
Wednesday
Patchy fog before noon. Otherwise, mostly cloudy, with a high near 44. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
A chance of rain, mainly after 3am. Patchy fog. Otherwise, cloudy, with a low around 41. South wind 9 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Thursday
Rain likely, mainly after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 49. Southwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A slight chance of rain before 9pm. Partly cloudy, with a low around 29. West wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 42. West wind 7 to 10 mph becoming southwest in the afternoon.
Friday Night
A chance of rain after 11pm. Mostly cloudy, with a low around 33. South wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 44. West wind 15 to 17 mph, with gusts as high as 28 mph.
Saturday Night
Partly cloudy, with a low around 30. Northwest wind 8 to 10 mph.
Sunday
Mostly cloudy, with a high near 46. North wind 6 to 10 mph becoming southeast in the afternoon.
Sunday Night
Rain likely. Cloudy, with a low around 37. Breezy, with a south wind 13 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 60%.
Monday
Rain. High near 50. Breezy, with a south wind around 22 mph, with gusts as high as 37 mph. Chance of precipitation is 90%.
Monday Night
Rain likely. Mostly cloudy, with a low around 27. Southwest wind 15 to 17 mph becoming west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Tuesday
A chance of rain. Partly sunny, with a high near 37. West wind 10 to 13 mph. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
South Harwich MA
 41.67°N 70.05°W (Elev. 10 ft)
Last Update:
4:02 pm EDT Mar 10, 2026
Forecast Valid:
10pm EDT Mar 10, 2026-6pm EDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation