Dennis Port Weather Forecast

    • 69
    • 84

    Slight Chance Thunderstorms

    • 64
    • 75

    Partly Sunny

    • 66
    • 72

    Mostly Sunny

    • 68
    • 80

    Mostly Sunny

    • 72
    • 83

    Mostly Sunny

    • 71
    • 86

    Chance Rain

Today 10 Jul Barnstable

Partly sunny. A slight chance of Showers in the Morning, then a slight chance of Showers and Thunderstorms in the afternoon. Patchy fog in the morning. Humid with Highs in the mid 80s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 10 Jul Barnstable

Partly cloudy in the Evening, then becoming mostly cloudy. Humid with Lows in the upper 60s. South Winds around 5 Mph, becoming northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Port Temperature Statistics

July Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 6 July, 2026

    61 °F

  • Average July

    73.6 °F

  • Highest 3 July, 2026

    91 °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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