Beach Plum Island Weather Forecast

    • 64
    • 79

    Sunny

    • 65
    • 83

    Mostly Sunny

    • 65
    • 75

    Mostly Cloudy

    • 63
    • 73

    Mostly Cloudy

    • 64
    • 75

    Partly Sunny

    • 66
    • 80

    Mostly Cloudy

    • 65
    • 79

    Partly Sunny

Today 18 Sep Inland Sussex

Mostly cloudy this Morning, then becoming partly sunny. Areas of fog this morning. Highs in the upper 70s. Northwest Winds 5 to 10 Mph.

Tonight 18 Sep Inland Sussex

Clear. Areas of fog after midnight. Lows in the lower 60s. Southwest Winds around 5 Mph.

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Beach Plum Island Temperature Statistics

September Temperature

Georgetown - Delaware Coastal Airport (12.4 miles)

  • Lowest 9 September, 2025

    52 °F

  • Average September

    68 °F

  • Highest 6 September, 2025

    91.9 °F

Climate (2020–Present)

Georgetown - Delaware Coastal Airport (12.4 miles)

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  • Average Low 2020–2025

    49.3 °F

  • Average 2020–2025

    58.8 °F

  • Average High 2020–2025

    68.5 °F
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