Hyannis Breakwater Weather Forecast

    • 68
    • 76

    Isolated Thunderstorms

    • 66
    • 74

    Mostly Sunny

    • 69
    • 74

    Mostly Sunny

    • 71
    • 74

    Chance Rain Showers

    • 70
    • 76

    Slight Chance Rain Showers

    • 67
    • 74

    Partly Sunny

    • 69
    • 74

    Partly Sunny

Today 24 Aug Barnstable

Sunny. Near steady temperature in the mid 70s. Southwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 24 Aug Barnstable

Partly cloudy with isolated Showers and Thunderstorms this Evening, then partly cloudy after midnight. Patchy fog after midnight. Lows in the lower 60s. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph this evening. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hyannis Breakwater Temperature Statistics

August Temperature

Hyannis, Barnstable Municipal-Boardman Airport (3.1 miles)

  • Lowest 16 August, 2026

    55.9 °F

  • Average August

    74 °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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