Heron Island Weather Forecast

    • 55
    • 64

    Mostly Cloudy

    • 56
    • 66

    Mostly Sunny

    • 57
    • 68

    Partly Sunny

    • 59
    • 69

    Partly Sunny

    • 60
    • 68

    Chance Rain Showers

    • 59
    • 67

    Chance Rain Showers

Today 20 Aug Coastal Hancock

Mostly cloudy. Highs in the lower 70s. Southeast Winds 5 to 10 Mph.

Tonight 20 Aug Coastal Hancock

Mostly cloudy with a slight chance of Showers in the Evening, then partly cloudy after midnight. Patchy fog after midnight. Lows in the lower 50s. South Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

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Heron Island Temperature Statistics

August Temperature

Bar Harbor, Hancock County-Bar Harbor Airport (24.2 miles)

  • Lowest 2 August, 2025

    48 °F

  • Average August

    67.5 °F

  • Highest 12 August, 2025

    91 °F

Climate (2020–Present)

Bar Harbor, Hancock County-Bar Harbor Airport (24.2 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    54.7 °F
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