Great South Bay Weather Forecast

    • 34
    • 40

    Rain

    • 33
    • 41

    Chance Snow

    • 31
    • 36

    Snow Likely

    • 27
    • 34

    Slight Chance Snow

    • 26
    • 34

    Mostly Cloudy

    • 36
    • 40

    Rain Likely

Today 20 Feb Southwest Suffolk

Rain. Highs around 40. East Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 20 Feb Southwest Suffolk

Mostly cloudy. A chance of rain in the evening. Lows in the lower 30s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming northwest after midnight. Chance of rain 40 percent.

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  • Temperature Real-Time

Great South Bay Temperature Statistics

February Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 8 February, 2026

    4.6 °F

  • Average February

    26 °F

  • Highest 14 February, 2026

    43.6 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63 °F
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