Great South Bay Weather Forecast

    • 31
    • 44

    Increasing Clouds

    • 38
    • 47

    Mostly Cloudy

    • 45
    • 53

    Rain Likely

    • 28
    • 48

    Partly Sunny

    • 34
    • 39

    Mostly Sunny

    • 38
    • 44

    Partly Sunny

Today 24 Mar Southwest Suffolk

Sunny. Highs in the mid 40s. North Winds around 15 Mph with Gusts up to 30 Mph, becoming northwest.

Tonight 24 Mar Southwest Suffolk

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the mid 30s. Southwest Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • 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

    40.9 °F

  • Highest 9 March, 2026

    68.6 °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

    55.1 °F

  • Average High 2021–2026

    63 °F
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