Islesboro Island - Billys Shore Weather Forecast

    • 71
    • 83

    Rain Showers

    • 66
    • 84

    Mostly Sunny

    • 59
    • 81

    Chance Rain Showers

    • 59
    • 76

    Mostly Sunny

    • 60
    • 81

    Chance Rain Showers

    • 61
    • 79

    Chance Rain Showers

Today 14 Jul Coastal Waldo

Mostly cloudy this Morning, then becoming partly sunny. Isolated Showers. Warm with Highs in the upper 80s. Light and variable Winds, becoming southwest around 10 Mph with Gusts up to 20 Mph this afternoon. Chance of rain 20 percent. Heat index Values in the mid 90s this afternoon.

Tonight 14 Jul Coastal Waldo

Partly cloudy with numerous Showers and scattered Thunderstorms in the Evening, then mostly cloudy with scattered Showers with isolated Thunderstorms after midnight. Some Thunderstorms may be severe with damaging Winds and large hail. Humid with Lows around 70. West Winds around 10 Mph in the Evening, becoming light and variable. Chance of rain 60 percent. Heat index Values in the lower 90s early in the evening.

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Islesboro Island - Billys Shore Temperature Statistics

July Temperature

Rockland, Knox County Regional Airport (20.5 miles)

  • Lowest 6 July, 2026

    55 °F

  • Average July

    71.8 °F

  • Highest 2 July, 2026

    91.9 °F

Climate (2021–2026)

Rockland, Knox County Regional Airport (20.5 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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