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.

Thunderstorm

63°F

17°C

Humidity 97%
Wind Speed SW 7 mph
Barometer 29.88 in (1011.8 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 14 Oct 12:52 am EDT
Extended Forecast for

Harwich Port MA

  • Overnight

    Overnight: A chance of showers and thunderstorms, mainly before 3am. Mostly cloudy, with a low around 60. Southwest wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Patchy fog between 7am and 10am. Otherwise, mostly sunny, with a high near 72. Southwest wind 11 to 13 mph, with gusts as high as 24 mph.

    High: 72 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 58. North wind 10 to 14 mph.

    High: 58 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47. Calm wind becoming southeast around 6 mph after midnight.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Showers and possibly a thunderstorm before 2pm, then showers between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. High near 67. South wind 13 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%.

    High: 67 °F

    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 45. Breezy, with a west wind 22 to 25 mph. Chance of precipitation is 70%.

    Low: 45 °F

    Showers
    Likely and
    Breezy

  • Saturday

    Saturday: A chance of showers before 9am. Mostly sunny, with a high near 53. Breezy, with a northwest wind 23 to 25 mph. Chance of precipitation is 30%.

    High: 53 °F

    Breezy.
    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. Breezy, with a northwest wind 17 to 22 mph, with gusts as high as 33 mph.

    Low: 39 °F

    Mostly Clear
    and Breezy

Detailed Forecast

Overnight
A chance of showers and thunderstorms, mainly before 3am. Mostly cloudy, with a low around 60. Southwest wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Patchy fog between 7am and 10am. Otherwise, mostly sunny, with a high near 72. Southwest wind 11 to 13 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 51. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 58. North wind 10 to 14 mph.
Thursday Night
Partly cloudy, with a low around 47. Calm wind becoming southeast around 6 mph after midnight.
Friday
Showers and possibly a thunderstorm before 2pm, then showers between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. High near 67. South wind 13 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%.
Friday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 45. Breezy, with a west wind 22 to 25 mph. Chance of precipitation is 70%.
Saturday
A chance of showers before 9am. Mostly sunny, with a high near 53. Breezy, with a northwest wind 23 to 25 mph. Chance of precipitation is 30%.
Saturday Night
Mostly clear, with a low around 39. Breezy, with a northwest wind 17 to 22 mph, with gusts as high as 33 mph.
Sunday
Sunny, with a high near 55. West wind around 15 mph.
Sunday Night
Mostly clear, with a low around 46. Southwest wind 7 to 9 mph.
Monday
Mostly sunny, with a high near 60. Southwest wind 9 to 16 mph.
Monday Night
Partly cloudy, with a low around 51. Southwest wind 9 to 13 mph.
Tuesday
Mostly sunny, with a high near 62. West wind around 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harwich Port MA
 41.67°N 70.08°W (Elev. 10 ft)
Last Update:
11:55 pm EDT Oct 13, 2026
Forecast Valid:
1am EDT Oct 14, 2026-6pm EDT Oct 20, 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