Saint Johns River - Chicopit Bay Weather Forecast

    • 75
    • 84

    Slight Chance Thunderstorms

    • 75
    • 84

    Chance Thunderstorms

    • 75
    • 85

    Rain Showers Likely

    • 75
    • 85

    Rain Showers Likely

    • 73
    • 84

    Chance Thunderstorms

    • 72
    • 82

    Chance Rain Showers

Today 20 Sep Coastal Duval

Mostly cloudy with a slight chance of Showers and Thunderstorms. Highs in the mid 80s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 20 Sep Coastal Duval

Mostly cloudy in the Evening, then becoming partly cloudy. A slight chance of Showers and Thunderstorms. Lows in the mid 70s. East Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Johns River - Chicopit Bay Temperature Statistics

September Temperature

Mayport Naval Station - Adm David L. McDonald Field (2.5 miles)

  • Lowest 11 September, 2026

    78.1 °F

  • Average September

    83.6 °F

  • Highest 10 September, 2026

    90 °F

Climate (2021–2026)

Mayport Naval Station - Adm David L. McDonald Field (2.5 miles)

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  • Average Low 2021–2026

    65.6 °F

  • Average 2021–2026

    72.7 °F

  • Average High 2021–2026

    80 °F
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