Islesboro Island - Billys Shore Weather Forecast

    • 58
    • 79

    Sunny

    • 60
    • 76

    Mostly Sunny

    • 54
    • 79

    Rain Showers Likely

    • 53
    • 72

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 56
    • 71

    Partly Sunny

    • 55
    • 74

    Mostly Sunny

Today 15 Aug Coastal Waldo

Sunny. Highs around 80. Light and variable Winds.

Tonight 15 Aug Coastal Waldo

Clear. Lows in the mid 50s. Light and variable Winds.

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Islesboro Island - Billys Shore Temperature Statistics

August Temperature

Rockland, Knox County Regional Airport (20.5 miles)

  • Lowest 2 August, 2025

    48.9 °F

  • Average August

    66.8 °F

  • Highest 12 August, 2025

    86 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (20.5 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    55.2 °F
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