Fernandina Beach Weather Forecast

    • 79
    • 95

    Chance Thunderstorms

    • 78
    • 95

    Slight Chance Thunderstorms

    • 77
    • 94

    Slight Chance Thunderstorms

    • 76
    • 93

    Chance Thunderstorms

    • 75
    • 92

    Thunderstorms Likely

    • 76
    • 91

    Chance Thunderstorms

Today 18 Aug Coastal Nassau

Mostly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the upper 90s. West Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 111.

Tonight 18 Aug Coastal Nassau

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the upper 70s. West Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values up to 105 early in the evening.

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Fernandina Beach Temperature Statistics

August Temperature

Fernandina Beach Municipal Airport (3.7 miles)

  • Lowest 8 August, 2026

    73.4 °F

  • Average August

    80.4 °F

  • Highest 1 August, 2026

    91.4 °F

Climate (2021–2026)

Fernandina Beach Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    62.7 °F

  • Average 2021–2026

    70.1 °F

  • Average High 2021–2026

    78.2 °F
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