Nassau River - Mesa Marsh Weather Forecast

    • 70
    • 83

    Decreasing Clouds

    • 75
    • 83

    Mostly Sunny

    • 75
    • 82

    Mostly Sunny

    • 77
    • 82

    Chance Rain Showers

    • 77
    • 81

    Chance Thunderstorms

    • 76
    • 81

    Chance Thunderstorms

Today 17 Sep Coastal Nassau

Mostly sunny. Highs in the upper 80s. East Winds 5 to 10 Mph.

Tonight 17 Sep Coastal Nassau

Mostly cloudy this Evening, then becoming partly cloudy. Lows in the mid 60s. Southeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Nassau River - Mesa Marsh Temperature Statistics

September Temperature

Fernandina Beach Municipal Airport (5 miles)

  • Lowest 15 September, 2025

    66.2 °F

  • Average September

    77.3 °F

  • Highest 6 September, 2025

    87.8 °F

Climate (2020–Present)

Fernandina Beach Municipal Airport (5 miles)

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  • Average Low 2020–2025

    62.3 °F

  • Average 2020–2025

    69.6 °F

  • Average High 2020–2025

    77.7 °F
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