Islesboro Island - Charlottes Cove Weather Forecast

    • 42
    • 73

    Mostly Sunny

    • 41
    • 66

    Sunny

    • 51
    • 66

    Mostly Sunny

    • 55
    • 68

    Partly Sunny

    • 55
    • 73

    Chance Rain Showers

    • 52
    • 70

    Chance Rain Showers

Today 19 Sep Coastal Waldo

Mostly sunny. Highs in the lower 70s. Northwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 19 Sep Coastal Waldo

Clear. Lows around 40. Northwest Winds around 10 Mph.

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Islesboro Island - Charlottes Cove Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (18 miles)

  • Lowest 10 September, 2025

    43 °F

  • Average September

    59.9 °F

  • Highest 1 September, 2025

    75.9 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (18 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    55.3 °F
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