Slate Island Weather Forecast

    • 57
    • 67

    Partly Sunny

    • 56
    • 65

    Rain Showers

    • 56
    • 71

    Mostly Sunny

    • 55
    • 70

    Mostly Sunny

    • 55
    • 64

    Chance Rain Showers

    • 56
    • 64

    Chance Rain Showers

    • 56
    • 66

    Partly Sunny

Today 12 Aug Coastal Washington

Mostly sunny. Highs in the upper 70s. West Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 12 Aug Coastal Washington

Partly cloudy. Isolated Showers and Thunderstorms this evening. Lows in the upper 50s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Slate Island Temperature Statistics

August Temperature

Bar Harbor, Hancock County-Bar Harbor Airport (37.3 miles)

  • Lowest 1 August, 2026

    57 °F

  • Average August

    70.6 °F

  • Highest 6 August, 2026

    90 °F

Climate (2021–2026)

Bar Harbor, Hancock County-Bar Harbor Airport (37.3 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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