Grand Beach Weather Forecast

    • 62
    • 72

    Mostly Cloudy

    • 61
    • 77

    Mostly Cloudy

    • 61
    • 79

    Partly Sunny

    • 58
    • 80

    Mostly Sunny

    • 58
    • 77

    Partly Sunny

    • 58
    • 74

    Slight Chance Rain Showers

Today 17 Aug Coastal Cumberland

Mostly cloudy. Highs in the lower 70s. South Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 17 Aug Coastal Cumberland

Mostly cloudy. Isolated Showers after midnight. Patchy fog after midnight. Humid with Lows in the lower 60s. South Winds around 10 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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Grand Beach Temperature Statistics

August Temperature

Portland, Portland International Jetport (7.5 miles)

  • Lowest 15 August, 2026

    55.4 °F

  • Average August

    73.2 °F

  • Highest 9 August, 2026

    92.6 °F

Climate (2021–2026)

Portland, Portland International Jetport (7.5 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    57.3 °F
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