Saint Johns River Mouth Weather Forecast

    • 72
    • 75

    Partly Sunny

    • 73
    • 78

    Partly Sunny

    • 73
    • 77

    Partly Sunny

    • 74
    • 77

    Mostly Sunny

    • 74
    • 77

    Partly Sunny

    • 73
    • 78

    Partly Sunny

Today 15 May Coastal Duval

Sunny. Highs in the lower 80s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 15 May Coastal Duval

Partly cloudy this Evening, then clearing. Lows in the upper 60s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Johns River Mouth Temperature Statistics

May Temperature

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

  • Lowest 4 May, 2026

    59 °F

  • Average May

    73.3 °F

  • Highest 11 May, 2026

    89.1 °F

Climate (2021–Present)

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

    72.6 °F

  • Average High 2021–2026

    80 °F
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