Seaside Weather Forecast

    • 63
    • 72

    Chance Rain Showers

    • 48
    • 72

    Becoming Sunny

    • 52
    • 67

    Mostly Sunny

    • 55
    • 69

    Mostly Sunny

    • 55
    • 66

    Partly Sunny

    • 53
    • 70

    Mostly Sunny

    • 53
    • 70

    Mostly Sunny

Today 18 Dec Northeast Coastal St. Johns

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms this afternoon. Highs in the lower 70s. Southeast Winds 10 to 15 Mph. Chance of rain 40 percent.

Tonight 18 Dec Northeast Coastal St. Johns

A slight chance of Thunderstorms this evening. Mostly cloudy with a chance of Showers. Lows in the mid 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

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Seaside Temperature Statistics

December Temperature

Northeast Florida Regional Airport (13.7 miles)

  • Lowest 16 December, 2025

    43 °F

  • Average December

    59 °F

  • Highest 2 December, 2025

    81 °F

Climate (2020–Present)

Northeast Florida Regional Airport (13.7 miles)

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  • Average Low 2020–2025

    63.6 °F

  • Average 2020–2025

    70.7 °F

  • Average High 2020–2025

    77.9 °F
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