Fort George Island - Sisters Creek Weather Forecast

    • 77
    • 91

    Chance Thunderstorms

    • 78
    • 91

    Mostly Sunny

    • 77
    • 88

    Rain Showers Likely

    • 77
    • 85

    Partly Sunny

    • 76
    • 84

    Chance Thunderstorms

    • 75
    • 85

    Chance Thunderstorms

Today 13 Sep Coastal Duval

Mostly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values up to 106.

Tonight 13 Sep Coastal Duval

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the upper 70s. South Winds 5 to 10 Mph, becoming southwest after midnight. Chance of rain 50 percent.

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Fort George Island - Sisters Creek Temperature Statistics

September Temperature

Mayport Naval Station - Adm David L. McDonald Field (1.9 miles)

  • Lowest 11 September, 2026

    78.1 °F

  • Average September

    83.6 °F

  • Highest 10 September, 2026

    90 °F

Climate (2021–2026)

Mayport Naval Station - Adm David L. McDonald Field (1.9 miles)

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  • Average Low 2021–2026

    65.6 °F

  • Average 2021–2026

    72.7 °F

  • Average High 2021–2026

    80 °F
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