Great South Bay Weather Forecast

    • 27
    • 38

    Breezy

    • 29
    • 34

    Partly Sunny

    • 37
    • 40

    Partly Sunny

    • 39
    • 44

    Chance Rain

    • 38
    • 45

    Chance Rain

    • 34
    • 46

    Chance Rain

Today 17 Mar Southwest Suffolk

Mostly sunny and breezy. Highs in the lower 40s. West Winds 15 to 25 Mph with Gusts up to 45 Mph.

Tonight 17 Mar Southwest Suffolk

Partly cloudy with a chance of Flurries in the Evening, then mostly clear after midnight. Lows in the mid 20s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph.

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  • Temperature Real-Time

Great South Bay Temperature Statistics

March Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 3 March, 2026

    18.6 °F

  • Average March

    39.8 °F

  • Highest 9 March, 2026

    66.9 °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

    55.1 °F

  • Average High 2021–2026

    63 °F
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