Montsweag Bay - Back River Entrance Weather Forecast

    • 55
    • 75

    Gradual Clearing

    • 39
    • 76

    Mostly Sunny

    • 37
    • 69

    Sunny

    • 49
    • 70

    Mostly Sunny

    • 55
    • 72

    Partly Sunny

    • 55
    • 80

    Partly Sunny

Today 18 Sep Lincoln

Partly sunny. Highs in the mid 70s. Light and variable Winds.

Tonight 18 Sep Lincoln

Mostly clear in the Evening, then becoming partly cloudy. Patchy fog. Lows in the mid 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Montsweag Bay - Back River Entrance Temperature Statistics

September Temperature

Wiscasset Airport (1.2 miles)

  • Lowest 9 September, 2025

    44.1 °F

  • Average September

    62.8 °F

  • Highest 1 September, 2025

    82 °F

Climate (2020–Present)

Wiscasset Airport (1.2 miles)

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  • Average Low 2020–2025

    38.9 °F

  • Average 2020–2025

    48.5 °F

  • Average High 2020–2025

    57.9 °F
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