Great South Bay Weather Forecast

    • 77
    • 81

    Partly Sunny

    • 76
    • 80

    Chance Thunderstorms

    • 76
    • 83

    Slight Chance Thunderstorms

    • 74
    • 83

    Mostly Sunny

    • 76
    • 84

    Partly Sunny

    • 75
    • 84

    Chance Rain Showers

    • 73
    • 81

    Chance Rain Showers

Today 6 Aug Southwest Suffolk

Mostly sunny. Highs in the mid 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values in the upper 90s.

Tonight 6 Aug Southwest Suffolk

Partly cloudy. Lows in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Real-Time

Great South Bay Temperature Statistics

August Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 4 August, 2026

    64.9 °F

  • Average August

    76.6 °F

  • Highest 1 August, 2026

    83.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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