Great South Bay Weather Forecast

    • 61
    • 69

    Increasing Clouds

    • 63
    • 73

    Mostly Cloudy

    • 64
    • 73

    Rain Showers Likely

    • 59
    • 78

    Rain Showers Likely

    • 57
    • 67

    Mostly Sunny

    • 59
    • 67

    Partly Sunny

    • 61
    • 69

    Partly Sunny

Today 4 Jun Southwest Suffolk

Sunny. Highs in the upper 70s. South Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 4 Jun Southwest Suffolk

Partly cloudy. Lows in the lower 60s. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph this evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 2 June, 2026

    46 °F

  • Average June

    60.7 °F

  • Highest 2 June, 2026

    75.9 °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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