Great South Bay Weather Forecast

    • 37
    • 41

    Mostly Sunny

    • 41
    • 44

    Partly Sunny

    • 45
    • 53

    Partly Sunny

    • 41
    • 57

    Mostly Sunny

    • 45
    • 52

    Partly Sunny

    • 51
    • 59

    Breezy

Today 8 Apr Southwest Suffolk

Sunny. Highs in the mid 40s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming east in the afternoon.

Tonight 8 Apr Southwest Suffolk

Mostly clear. Lows in the mid 30s. Southeast Winds around 5 Mph.

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Great South Bay Temperature Statistics

April Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 2 April, 2026

    39.7 °F

  • Average April

    51.5 °F

  • Highest 1 April, 2026

    72.6 °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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