Matanzas River Mouth (St Augustine Inlet) Weather Forecast

    • 73
    • 80

    Chance Rain Showers

    • 69
    • 78

    Slight Chance Thunderstorms

    • 68
    • 79

    Mostly Sunny

    • 71
    • 81

    Partly Sunny

    • 73
    • 82

    Mostly Sunny

    • 75
    • 82

    Slight Chance Thunderstorms

Today 24 Sep Southeast Coastal St. Johns

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms this afternoon. Windy with Highs in the lower 80s. North Winds 20 to 30 Mph. Chance of rain 50 percent.

Tonight 24 Sep Southeast Coastal St. Johns

A slight chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Windy with Lows in the lower 70s. North Winds 20 to 30 Mph. Chance of rain 40 percent.

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Matanzas River Mouth (St Augustine Inlet) Temperature Statistics

September Temperature

Northeast Florida Regional Airport (4.3 miles)

  • Lowest 19 September, 2026

    72 °F

  • Average September

    80.9 °F

  • Highest 13 September, 2026

    90 °F

Climate (2021–2026)

Northeast Florida Regional Airport (4.3 miles)

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  • Average Low 2021–2026

    63.8 °F

  • Average 2021–2026

    70.8 °F

  • Average High 2021–2026

    78.1 °F
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