Isle Au Haut - Old Cove Weather Forecast

    • 45
    • 53

    Mostly Cloudy

    • 48
    • 54

    Mostly Sunny

    • 49
    • 57

    Chance Rain Showers

    • 50
    • 61

    Mostly Sunny

    • 53
    • 64

    Mostly Sunny

    • 53
    • 66

    Partly Sunny

    • 52
    • 67

    Partly Sunny

Today 31 May Knox

Partly sunny this Morning, then mostly cloudy with numerous Showers with isolated Thunderstorms this afternoon. Highs in the lower 60s. Light and variable Winds, becoming south around 10 Mph this afternoon. Chance of rain 70 percent.

Tonight 31 May Knox

A slight chance of Thunderstorms early. Showers likely early. A slight chance of Showers after midnight. Patchy fog after midnight. Lows in the lower 40s. South Winds around 10 Mph Early, becoming light and variable. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle Au Haut - Old Cove Temperature Statistics

May Temperature

Rockland, Knox County Regional Airport (24.2 miles)

  • Lowest 4 May, 2026

    32 °F

  • Average May

    53.8 °F

  • Highest 20 May, 2026

    86 °F

Climate (2021–Present)

Rockland, Knox County Regional Airport (24.2 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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