Flat Island Weather Forecast

    • 51
    • 62

    Slight Chance Rain Showers

    • 50
    • 61

    Chance Rain Showers

    • 51
    • 60

    Chance Rain Showers

    • 53
    • 64

    Chance Rain Showers

    • 52
    • 65

    Partly Sunny

Today 20 Jun Coastal Washington

Partly sunny. Scattered Showers, mainly in the morning. Highs around 70. West Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 20 Jun Coastal Washington

Partly cloudy. Lows in the lower 50s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Flat Island Temperature Statistics

June Temperature

Bar Harbor, Hancock County-Bar Harbor Airport (32.3 miles)

  • Lowest 1 June, 2026

    37 °F

  • Average June

    60.7 °F

  • Highest 10 June, 2026

    82 °F

Climate (2021–2026)

Bar Harbor, Hancock County-Bar Harbor Airport (32.3 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    46.4 °F

  • Average High 2021–2026

    54.5 °F
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