Great South Bay Weather Forecast

    • 52
    • 68

    Increasing Clouds

    • 57
    • 65

    Mostly Cloudy

    • 62
    • 66

    Rain Showers

    • 60
    • 67

    Partly Sunny

    • 58
    • 67

    Chance Rain Showers

    • 54
    • 64

    Partly Sunny

Today 9 Oct Southwest Suffolk

Sunny. Highs around 70. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Oct Southwest Suffolk

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 40s. Northwest Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 7 October, 2026

    41 °F

  • Average October

    61.9 °F

  • Highest 2 October, 2026

    79.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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