Treat Island Weather Forecast

    • 59
    • 80

    Sunny

    • 57
    • 80

    Mostly Sunny

    • 58
    • 76

    Partly Sunny

    • 60
    • 78

    Slight Chance Thunderstorms

    • 60
    • 77

    Chance Rain Showers

    • 60
    • 76

    Partly Sunny

Today 4 Aug Coastal Washington

Sunny. Much warmer with Highs in the lower 80s. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 4 Aug Coastal Washington

Clear. Lows in the lower 60s. West Winds 10 to 15 Mph with Gusts up to 25 Mph, Diminishing to around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Treat Island Temperature Statistics

August Temperature

Bar Harbor, Hancock County-Bar Harbor Airport (73.3 miles)

  • Lowest 1 August, 2026

    57 °F

  • Average August

    67.6 °F

  • Highest 1 August, 2026

    79 °F

Climate (2021–2026)

Bar Harbor, Hancock County-Bar Harbor Airport (73.3 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    46.5 °F

  • Average High 2021–2026

    54.6 °F
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