Great South Bay Weather Forecast

    • 76
    • 84

    Sunny

    • 77
    • 93

    Isolated Thunderstorms

    • 73
    • 90

    Chance Thunderstorms

    • 70
    • 81

    Rain Showers Likely

    • 69
    • 78

    Chance Thunderstorms

    • 69
    • 78

    Partly Sunny

    • 70
    • 79

    Partly Sunny

Today 2 Jul Southwest Suffolk

Sunny. Highs in the lower 90s. Southwest Winds 10 to 15 Mph. Heat index Values up to 109.

Tonight 2 Jul Southwest Suffolk

Clear with Lows in the upper 70s. Southwest Winds 10 to 15 Mph, becoming west 5 to 10 Mph after midnight.

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Great South Bay Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average July

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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 °F
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