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

64°F

18°C

Humidity 100%
Wind Speed W 3 mph
Barometer 29.86 in (1011.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 31 Jul 3:52 am EDT
Extended Forecast for

Harwich Port MA

  • Today

    Today: Mostly sunny, with a high near 75. Northwest wind 5 to 8 mph becoming west in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 67. Southwest wind around 7 mph.

    Low: 67 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. South wind 5 to 11 mph.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 69. Southwest wind around 8 mph.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 78. South wind 7 to 11 mph.

    High: 78 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 69. South wind around 9 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 80. Southwest wind 11 to 14 mph. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 67. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. West wind around 8 mph becoming southwest in the afternoon.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 75. Northwest wind 5 to 8 mph becoming west in the afternoon.
Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 67. Southwest wind around 7 mph.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 78. South wind 5 to 11 mph.
Saturday Night
Mostly cloudy, with a low around 69. Southwest wind around 8 mph.
Sunday
Partly sunny, with a high near 78. South wind 7 to 11 mph.
Sunday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 69. South wind around 9 mph. Chance of precipitation is 30%.
Monday
A chance of showers. Mostly cloudy, with a high near 80. Southwest wind 11 to 14 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 67. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 79. West wind around 8 mph becoming southwest in the afternoon.
Tuesday Night
Partly cloudy, with a low around 68. Southwest wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 79. South wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 68. Southwest wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 80. South wind 7 to 11 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harwich Port MA
 41.67°N 70.08°W (Elev. 10 ft)
Last Update:
2:29 pm EDT Jul 30, 2026
Forecast Valid:
4am EDT Jul 31, 2026-6pm EDT Aug 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation