Nassau Sound Weather Forecast

    • 76
    • 86

    Mostly Sunny

    • 77
    • 84

    Slight Chance Thunderstorms

    • 78
    • 85

    Chance Thunderstorms

    • 77
    • 82

    Rain Showers Likely

    • 76
    • 80

    Rain Showers Likely

    • 76
    • 81

    Rain Showers Likely

Today 5 Sep Coastal Duval

Sunny. Highs in the upper 80s. Northeast Winds 10 to 15 Mph.

Tonight 5 Sep Coastal Duval

Partly cloudy. Lows in the lower 70s. East Winds 10 to 15 Mph, becoming northeast around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nassau Sound Temperature Statistics

September Temperature

Mayport Naval Station - Adm David L. McDonald Field (6.8 miles)

  • Lowest 3 September, 2025

    73.9 °F

  • Average September

    78.8 °F

  • Highest 2 September, 2025

    82 °F

Climate (2020–Present)

Mayport Naval Station - Adm David L. McDonald Field (6.8 miles)

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  • Average Low 2020–2025

    65.8 °F

  • Average 2020–2025

    72.8 °F

  • Average High 2020–2025

    80.1 °F
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