South Harpswell Weather Forecast

    • 46
    • 50

    Rain

    • 45
    • 54

    Chance Rain Showers

    • 43
    • 52

    Partly Sunny

    • 43
    • 54

    Partly Sunny

    • 45
    • 51

    Chance Rain Showers

    • 44
    • 52

    Chance Rain Showers

Today 9 May Coastal Cumberland

Partly sunny with a slight chance of rain Showers this Morning, then rain this afternoon. Highs in the upper 50s. Light and variable Winds, becoming southeast around 10 Mph with Gusts up to 20 Mph this afternoon. Chance of rain near 100 percent.

Tonight 9 May Coastal Cumberland

Cloudy. Showers, mainly in the evening. Lows in the mid 40s. South Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 90 percent.

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South Harpswell Temperature Statistics

May Temperature

Portland, Portland International Jetport (15.5 miles)

  • Lowest 2 May, 2026

    37.7 °F

  • Average May

    52.5 °F

  • Highest 4 May, 2026

    71.7 °F

Climate (2021–Present)

Portland, Portland International Jetport (15.5 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    57.2 °F
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