Barnstable Harbor Weather Forecast

    • 64
    • 76

    Decreasing Clouds

    • 61
    • 68

    Partly Sunny

    • 60
    • 68

    Mostly Sunny

    • 61
    • 70

    Mostly Sunny

    • 61
    • 73

    Partly Sunny

    • 64
    • 71

    Chance Rain Showers

Today 4 Sep Barnstable

Mostly sunny. Near steady temperature in the mid 70s. North Winds around 5 Mph.

Tonight 4 Sep Barnstable

Partly cloudy in the Evening, then clearing. Humid with Lows in the mid 60s. Southwest Winds around 5 Mph, becoming northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barnstable Harbor Temperature Statistics

September Temperature

Hyannis, Barnstable Municipal-Boardman Airport (3.1 miles)

  • Lowest 2 September, 2026

    59 °F

  • Average September

    65.6 °F

  • Highest 2 September, 2026

    73 °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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