Dennis Port Weather Forecast

    • 65
    • 71

    Rain Showers

    • 66
    • 72

    Rain Showers

    • 70
    • 76

    Chance Rain Showers

    • 65
    • 79

    Mostly Sunny

    • 65
    • 78

    Mostly Sunny

    • 68
    • 79

    Partly Sunny

Today 21 Aug Barnstable

Showers likely with isolated Thunderstorms, then Showers likely. Patchy fog. Cooler. Near steady temperature around 70. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 21 Aug Barnstable

Cloudy with a 50 percent chance of Showers. Patchy fog. Humid. Near steady temperature in the upper 60s. Northeast Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Port Temperature Statistics

August Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 16 August, 2026

    59 °F

  • Average August

    73.6 °F

  • Highest 11 August, 2026

    84.9 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.8 °F
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