Saint Johns River Mouth Weather Forecast

    • 60
    • 69

    Becoming Sunny

    • 61
    • 70

    Mostly Sunny

    • 62
    • 70

    Partly Sunny

    • 62
    • 71

    Partly Sunny

    • 49
    • 72

    Slight Chance Rain Showers

    • 41
    • 52

    Partly Sunny

Today 25 Dec Coastal Duval

Sunny. Highs in the upper 70s. Northwest Winds around 5 Mph.

Tonight 25 Dec Coastal Duval

Mostly clear. Patchy fog after midnight. Lows in the mid 50s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Johns River Mouth Temperature Statistics

December Temperature

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

  • Lowest 16 December, 2025

    39 °F

  • Average December

    58.2 °F

  • Highest 5 December, 2025

    80.1 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    65.6 °F

  • Average 2020–2025

    72.7 °F

  • Average High 2020–2025

    80 °F
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