Castine Weather Forecast

    • 57
    • 72

    Chance Rain

    • 53
    • 67

    Partly Sunny

    • 55
    • 68

    Mostly Sunny

    • 59
    • 70

    Mostly Sunny

    • 58
    • 72

    Mostly Sunny

    • 57
    • 69

    Partly Sunny

Today 31 Jul Coastal Hancock

Mostly cloudy with isolated Showers. Highs in the upper 70s. North Winds around 5 Mph. Chance of rain 20 percent.

Tonight 31 Jul Coastal Hancock

Cloudy. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows in the upper 50s. Southwest Winds around 5 Mph, becoming east after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castine Temperature Statistics

July Temperature

Bar Harbor, Hancock County-Bar Harbor Airport (21.1 miles)

  • Lowest 23 July, 2025

    52 °F

  • Average July

    66.9 °F

  • Highest 16 July, 2025

    86 °F

Climate (2020–Present)

Bar Harbor, Hancock County-Bar Harbor Airport (21.1 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    54.7 °F
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