Great Marsh Preserve Weather Forecast

    • 74
    • 90

    Chance Thunderstorms

    • 69
    • 90

    Rain Showers Likely

    • 67
    • 81

    Mostly Sunny

    • 63
    • 76

    Mostly Sunny

    • 61
    • 78

    Mostly Sunny

    • 63
    • 81

    Partly Sunny

    • 69
    • 84

    Partly Sunny

Today 3 Sep Inland Sussex

Mostly sunny. A chance of Showers and Thunderstorms this morning. Locally heavy rainfall possible this morning. Hot with Highs in the lower 90s. South Winds 5 to 10 Mph, becoming west this afternoon. Chance of rain 40 percent.

Tonight 3 Sep Inland Sussex

Partly cloudy this Evening, then becoming mostly cloudy. A chance of Showers with a slight chance of Thunderstorms. Lows in the mid 70s. Southwest Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Marsh Preserve Temperature Statistics

September Temperature

Georgetown - Delaware Coastal Airport (11.8 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    81.1 °F

  • Highest 1 September, 2026

    91 °F

Climate (2021–2026)

Georgetown - Delaware Coastal Airport (11.8 miles)

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  • Average Low 2021–2026

    48.9 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    68.3 °F
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