Nassau Sound - Simpson Creek Entrance Weather Forecast

    • 77
    • 93

    Decreasing Clouds

    • 77
    • 91

    Chance Thunderstorms

    • 76
    • 90

    Thunderstorms Likely

    • 77
    • 90

    Slight Chance Thunderstorms

    • 77
    • 91

    Slight Chance Thunderstorms

    • 77
    • 89

    Chance Thunderstorms

    • 77
    • 89

    Chance Thunderstorms

Today 20 Aug Coastal Duval

Showers and Thunderstorms likely. Some Thunderstorms may produce gusty Winds, frequent Lightning, and heavy rainfall. Highs in the mid 90s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent. Heat index Values up to 111.

Tonight 20 Aug Coastal Duval

Mostly cloudy with a chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Some Thunderstorms may produce gusty Winds, frequent Lightning, and heavy rainfall this evening. Lows in the mid 70s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nassau Sound - Simpson Creek Entrance Temperature Statistics

August Temperature

Mayport Naval Station - Adm David L. McDonald Field (6.2 miles)

  • Lowest 8 August, 2026

    73.9 °F

  • Average August

    82.2 °F

  • Highest 18 August, 2026

    99 °F

Climate (2021–2026)

Mayport Naval Station - Adm David L. McDonald Field (6.2 miles)

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  • Average Low 2021–2026

    65.6 °F

  • Average 2021–2026

    72.7 °F

  • Average High 2021–2026

    80.1 °F
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