Fire Island Weather Forecast

    • 30
    • 43

    Rain/Snow

    • 22
    • 34

    Snow

    • 28
    • 32

    Partly Sunny

    • 32
    • 35

    Partly Sunny

    • 39
    • 45

    Mostly Cloudy

    • 40
    • 50

    Chance Rain

Today 13 Dec Southwest Suffolk

Partly sunny in the Morning, then becoming mostly cloudy. Highs in the lower 40s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 13 Dec Southwest Suffolk

Cloudy. A chance of rain and snow in the Evening, then snow with a slight chance of rain after midnight. Snow accumulation of 1 to 3 Inches. Lows in the mid 20s. West Winds 10 to 15 Mph. Chance of precipitation 90 percent.

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Fire Island Temperature Statistics

December Temperature

Islip, Long Island Mac Arthur Airport (9.9 miles)

  • Lowest 5 December, 2025

    21 °F

  • Average December

    35.6 °F

  • Highest 10 December, 2025

    50 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (9.9 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    63.1 °F
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