Saint Johns River Mouth Weather Forecast

    • 78
    • 85

    Thunderstorms Likely

    • 79
    • 86

    Chance Thunderstorms

    • 79
    • 87

    Chance Thunderstorms

    • 79
    • 87

    Chance Thunderstorms

    • 79
    • 88

    Chance Thunderstorms

    • 79
    • 89

    Thunderstorms Likely

Today 15 Jun Coastal Duval

Partly sunny this Morning, then mostly cloudy with Showers with Thunderstorms likely this afternoon. Highs in the lower 90s. South Winds 5 to 10 Mph. Chance of rain 80 percent.

Tonight 15 Jun Coastal Duval

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Johns River Mouth Temperature Statistics

June Temperature

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

  • Lowest 1 June, 2025

    68.6 °F

  • Average June

    85.2 °F

  • Highest 7 June, 2025

    97.6 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    65.7 °F

  • Average 2020–2025

    72.6 °F

  • Average High 2020–2025

    80 °F
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