National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chatham, Chatham Municipal Airport (KCQX)

Lat: 41.69°NLon: 69.99°WElev: 66ft.

Fair

63°F

17°C

Humidity 60%
Wind Speed N 8 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 19 Sep 1:52 am EDT
Extended Forecast for

South Harwich MA

  • Overnight

    Overnight: Mostly cloudy, with a low around 55. North wind around 14 mph, with gusts as high as 25 mph.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 63. Northeast wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 63 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Northeast wind 3 to 5 mph.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 4pm. Mostly cloudy, with a high near 65. Southeast wind 8 to 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 65 °F

    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers. Patchy fog before 9pm. Low around 60. Southeast wind 7 to 9 mph. Chance of precipitation is 90%.

    Low: 60 °F

    Showers and
    Patchy Fog

  • Monday

    Monday: Showers likely, mainly before 11am. Mostly cloudy, with a high near 65. Northeast wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 56. Northeast wind 14 to 16 mph.

    Low: 56 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 64. Breezy, with a northeast wind 18 to 20 mph.

    High: 64 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 56. Breezy, with a northeast wind 20 to 22 mph.

    Low: 56 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 55. North wind around 14 mph, with gusts as high as 25 mph.
Saturday
Mostly sunny, with a high near 63. Northeast wind 9 to 13 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 47. Northeast wind 3 to 5 mph.
Sunday
Showers likely, mainly after 4pm. Mostly cloudy, with a high near 65. Southeast wind 8 to 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Showers. Patchy fog before 9pm. Low around 60. Southeast wind 7 to 9 mph. Chance of precipitation is 90%.
Monday
Showers likely, mainly before 11am. Mostly cloudy, with a high near 65. Northeast wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 56. Northeast wind 14 to 16 mph.
Tuesday
Mostly cloudy, with a high near 64. Breezy, with a northeast wind 18 to 20 mph.
Tuesday Night
Mostly cloudy, with a low around 56. Breezy, with a northeast wind 20 to 22 mph.
Wednesday
Partly sunny, with a high near 64. Breezy, with a northeast wind around 23 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly cloudy, with a low around 56. Windy, with a northeast wind 23 to 26 mph.
Thursday
A chance of showers. Partly sunny, with a high near 63. Breezy, with a northeast wind 23 to 25 mph, with gusts as high as 37 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 56. Breezy, with a northeast wind 21 to 24 mph. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly cloudy, with a high near 65. Breezy, with a north wind around 22 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:
12:56 am EDT Sep 19, 2026
Forecast Valid:
1am EDT Sep 19, 2026-6pm EDT Sep 25, 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