Anastasia Island Weather Forecast

    • 79
    • 93

    Chance Thunderstorms

    • 76
    • 95

    Slight Chance Thunderstorms

    • 76
    • 96

    Partly Sunny

    • 76
    • 94

    Mostly Sunny

    • 76
    • 94

    Partly Sunny

    • 76
    • 95

    Slight Chance Thunderstorms

    • 76
    • 93

    Chance Thunderstorms

Today 20 Jul Southeast Coastal St. Johns

Partly sunny with a chance of Showers and Thunderstorms. Highs in the lower 90s. Southeast Winds 15 to 20 Mph. Chance of rain 50 percent. Heat index Values up to 109.

Tonight 20 Jul Southeast Coastal St. Johns

Mostly cloudy with a chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Lows in the upper 70s. South Winds 15 to 20 Mph. Chance of rain 40 percent.

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Anastasia Island Temperature Statistics

July Temperature

Northeast Florida Regional Airport (9.9 miles)

  • Lowest 2 July, 2026

    72 °F

  • Average July

    81.5 °F

  • Highest 7 July, 2026

    93 °F

Climate (2021–2026)

Northeast Florida Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    63.7 °F

  • Average 2021–2026

    70.8 °F

  • Average High 2021–2026

    78 °F
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