Barnstable Harbor Weather Forecast

    • 67
    • 76

    Mostly Sunny

    • 70
    • 79

    Mostly Cloudy

    • 67
    • 79

    Chance Rain Showers

    • 59
    • 73

    Partly Sunny

    • 65
    • 79

    Partly Sunny

    • 68
    • 80

    Partly Sunny

Today 26 Aug Barnstable

Sunny. Highs in the mid 70s. Northwest Winds around 5 Mph, becoming south this afternoon.

Tonight 26 Aug Barnstable

Mostly clear in the Evening, then becoming mostly cloudy. Humid with Lows in the upper 60s. Southwest Winds 5 to 10 Mph.

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Barnstable Harbor Temperature Statistics

August Temperature

Hyannis, Barnstable Municipal-Boardman Airport (3.1 miles)

  • Lowest 16 August, 2026

    55.9 °F

  • Average August

    73.9 °F

  • Highest 7 August, 2026

    88 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (3.1 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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