Great South Bay Weather Forecast

    • 72
    • 80

    Smoke

    • 72
    • 79

    Rain Showers Likely

    • 73
    • 78

    Rain Showers

    • 70
    • 82

    Partly Sunny

    • 71
    • 78

    Slight Chance Thunderstorms

    • 72
    • 80

    Chance Rain Showers

Today 16 Jul Southwest Suffolk

Mostly sunny. Patchy smoke this Morning, then Areas of smoke this afternoon. Highs in the mid 80s. West Winds 10 to 15 Mph. Gusts up to 25 Mph this afternoon.

Tonight 16 Jul Southwest Suffolk

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Areas of smoke in the Evening, then smoke after midnight. Lows around 70. Northwest Winds 10 to 15 Mph. Chance of rain 20 percent.

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Great South Bay Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 7 July, 2026

    63.6 °F

  • Average July

    76.4 °F

  • Highest 3 July, 2026

    98.7 °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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