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.

Overcast

50°F

10°C

Humidity 93%
Wind Speed Calm
Barometer 29.96 in (1014.8 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 15 May 8:52 pm EDT
Extended Forecast for

Harwich Port MA

  • Tonight

    Tonight: Patchy fog before 1am, then patchy fog after 4am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 48. North wind around 6 mph becoming calm in the evening.

    Low: 48 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, sunny, with a high near 66. Southwest wind 7 to 13 mph, with gusts as high as 29 mph.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Scattered showers, mainly after 5am. Increasing clouds, with a low around 57. Southwest wind 11 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    Low: 57 °F

    Mostly Clear
    then
    Scattered
    Showers

  • Sunday

    Sunday: Isolated showers before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 77. Southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 77 °F

    Isolated
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 54. West wind 5 to 7 mph becoming north after midnight.

    Low: 54 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 67. Light and variable wind becoming southeast 5 to 8 mph in the morning.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. Southwest wind around 6 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. Southwest wind 8 to 14 mph, with gusts as high as 25 mph.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Southwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog before 1am, then patchy fog after 4am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 48. North wind around 6 mph becoming calm in the evening.
Saturday
Patchy fog before 7am. Otherwise, sunny, with a high near 66. Southwest wind 7 to 13 mph, with gusts as high as 29 mph.
Saturday Night
Scattered showers, mainly after 5am. Increasing clouds, with a low around 57. Southwest wind 11 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Sunday
Isolated showers before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 77. Southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 54. West wind 5 to 7 mph becoming north after midnight.
Monday
Mostly sunny, with a high near 67. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Monday Night
Mostly clear, with a low around 55. Southwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 72. Southwest wind 8 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 57. Southwest wind around 11 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 72. Southwest wind 9 to 13 mph, with gusts as high as 24 mph.
Wednesday Night
Scattered showers. Partly cloudy, with a low around 55. Southwest wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday
A chance of showers. Partly sunny, with a high near 64. West wind around 7 mph. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 52. Light and variable wind.
Friday
Mostly sunny, with a high near 60. North wind 3 to 6 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harwich Port MA
 41.67°N 70.08°W (Elev. 10 ft)
Last Update:
8:18 pm EDT May 15, 2026
Forecast Valid:
9pm EDT May 15, 2026-6pm EDT May 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation