Isle Au Haut - Old Cove Weather Forecast

    • 49
    • 58

    Increasing Clouds

    • 51
    • 62

    Chance Rain

    • 50
    • 59

    Rain

    • 49
    • 59

    Rain Showers

    • 49
    • 57

    Rain Showers Likely

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    • 58

    Slight Chance Rain Showers

Today 24 Sep Knox

Sunny. Highs in the mid 60s. Northeast Winds around 10 Mph, becoming east this afternoon.

Tonight 24 Sep Knox

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 40s. Light and variable Winds, becoming northeast around 10 Mph after midnight.

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Isle Au Haut - Old Cove Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (24.2 miles)

  • Lowest 20 September, 2026

    39 °F

  • Average September

    60.2 °F

  • Highest 10 September, 2026

    84 °F

Climate (2021–2026)

Rockland, Knox County Regional Airport (24.2 miles)

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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