Matanzas River Mouth (St Augustine Inlet) Weather Forecast

    • 76
    • 82

    Slight Chance Rain Showers

    • 76
    • 82

    Breezy

    • 76
    • 83

    Chance Thunderstorms

    • 76
    • 81

    Chance Thunderstorms

    • 76
    • 82

    Chance Thunderstorms

    • 75
    • 82

    Slight Chance Thunderstorms

    • 77
    • 84

    Slight Chance Thunderstorms

Today 10 Sep Southeast Coastal St. Johns

Mostly cloudy with a slight chance of Showers and Thunderstorms. Breezy with Highs in the mid 80s. North Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 20 percent.

Tonight 10 Sep Southeast Coastal St. Johns

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the lower 70s. Northeast Winds 15 to 20 Mph with Gusts up to 35 Mph, becoming north 5 to 10 Mph with Gusts up to 20 Mph after midnight.

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Matanzas River Mouth (St Augustine Inlet) Temperature Statistics

September Temperature

Northeast Florida Regional Airport (4.3 miles)

  • Lowest 4 September, 2025

    71.1 °F

  • Average September

    80.7 °F

  • Highest 7 September, 2025

    91 °F

Climate (2020–Present)

Northeast Florida Regional Airport (4.3 miles)

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  • Average Low 2020–2025

    63.8 °F

  • Average 2020–2025

    70.8 °F

  • Average High 2020–2025

    78.1 °F
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