Deer Isle - Sylvester Cove Weather Forecast

    • 37
    • 52

    Increasing Clouds

    • 40
    • 54

    Mostly Cloudy

    • 38
    • 54

    Partly Sunny

    • 39
    • 52

    Partly Sunny

    • 41
    • 50

    Rain Likely

    • 41
    • 51

    Rain Likely

Today 25 Apr Coastal Hancock

Mostly sunny. Not as cool with Highs in the mid 50s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 25 Apr Coastal Hancock

Partly cloudy. Lows in the mid 30s. North Winds around 5 Mph.

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  • Temperature Real-Time

Deer Isle - Sylvester Cove Temperature Statistics

April Temperature

Rockland, Knox County Regional Airport (21.1 miles)

  • Lowest 7 April, 2026

    24.1 °F

  • Average April

    41.5 °F

  • Highest 17 April, 2026

    66 °F

Climate (2021–Present)

Rockland, Knox County Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.9 °F
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