Dennis Port Weather Forecast

    • 62
    • 81

    Increasing Clouds

    • 60
    • 75

    Mostly Sunny

    • 69
    • 78

    Rain Showers

    • 66
    • 80

    Slight Chance Rain Showers

    • 67
    • 78

    Partly Sunny

    • 70
    • 82

    Partly Sunny

Today 14 Aug Barnstable

Sunny. Isolated Showers and Thunderstorms this afternoon. Highs around 80. Northwest Winds 5 to 10 Mph. Gusts up to 20 Mph this morning. Chance of rain 20 percent.

Tonight 14 Aug Barnstable

Mostly cloudy with scattered Showers with isolated Thunderstorms in the Evening, then mostly clear after midnight. Lows around 60. West Winds 5 to 10 Mph, becoming north after midnight. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Port Temperature Statistics

August Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 5 August, 2026

    61 °F

  • Average August

    75.2 °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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