Deer Isle - Sylvester Cove Weather Forecast

    • 47
    • 51

    Rain Showers

    • 48
    • 60

    Rain Showers Likely

    • 44
    • 58

    Rain Showers Likely

    • 43
    • 56

    Mostly Cloudy

    • 42
    • 55

    Chance Rain Showers

    • 43
    • 54

    Rain Showers Likely

Today 17 May Coastal Hancock

Cloudy. Scattered Showers late this Morning, then numerous Showers this afternoon. Areas of fog. Highs in the mid 50s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 60 percent.

Tonight 17 May Coastal Hancock

Showers, mainly in the evening. Areas of fog. Lows in the upper 40s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Deer Isle - Sylvester Cove Temperature Statistics

May Temperature

Rockland, Knox County Regional Airport (21.1 miles)

  • Lowest 13 May, 2025

    39.9 °F

  • Average May

    50.3 °F

  • Highest 15 May, 2025

    64.9 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (21.1 miles)

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  • Average Low 2020–2025

    40 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    55.3 °F
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