Dennis Port Weather Forecast

    • 57
    • 74

    Becoming Sunny

    • 64
    • 72

    Chance Rain Showers

    • 64
    • 75

    Rain Showers

    • 52
    • 72

    Mostly Sunny

    • 54
    • 68

    Mostly Sunny

    • 59
    • 74

    Partly Sunny

Today 11 Sep Barnstable

Sunny. Near steady temperature in the lower 70s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 11 Sep Barnstable

Clear. Lows in the mid 50s. Southwest Winds around 5 Mph, becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Port Temperature Statistics

September Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 6 September, 2026

    55 °F

  • Average September

    66.2 °F

  • Highest 4 September, 2026

    78.1 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    59.7 °F
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