South Dennis Weather Forecast

    • 71
    • 90

    Increasing Clouds

    • 71
    • 83

    Partly Sunny

    • 69
    • 85

    Chance Rain Showers

    • 63
    • 82

    Slight Chance Rain Showers

    • 65
    • 80

    Mostly Sunny

    • 67
    • 81

    Chance Rain Showers

Today 11 Aug Barnstable

Sunny. Highs in the mid 80s. West Winds 5 to 10 Mph. Gusts up to 20 Mph this afternoon.

Tonight 11 Aug Barnstable

Partly cloudy. Humid with Lows around 70. Northwest Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Dennis Temperature Statistics

August Temperature

Hyannis, Barnstable Municipal-Boardman Airport (6.2 miles)

  • Lowest 5 August, 2026

    60.1 °F

  • Average August

    76.5 °F

  • Highest 7 August, 2026

    88 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (6.2 miles)

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  • Average Low 2021–2026

    44.8 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    59.3 °F
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