Dennis Port Weather Forecast

    • 51
    • 71

    Mostly Sunny

    • 54
    • 75

    Partly Sunny

    • 61
    • 75

    Partly Sunny

    • 61
    • 76

    Mostly Cloudy

    • 62
    • 76

    Mostly Sunny

    • 65
    • 78

    Partly Sunny

Today 18 Aug Barnstable

Mostly sunny and cooler. Near steady temperature in the upper 60s. Northeast Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 18 Aug Barnstable

Partly cloudy. Cooler with Lows in the lower 50s. Northeast Winds 10 to 15 Mph.

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Dennis Port Temperature Statistics

August Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 9 August, 2025

    54.6 °F

  • Average August

    69.4 °F

  • Highest 12 August, 2025

    86.6 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    54.1 °F

  • Average High 2020–2025

    60.1 °F
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