Great South Bay Weather Forecast

    • 67
    • 76

    Rain Showers Likely

    • 69
    • 77

    Partly Sunny

    • 72
    • 79

    Partly Sunny

    • 73
    • 81

    Chance Rain Showers

    • 71
    • 80

    Chance Rain Showers

    • 71
    • 79

    Slight Chance Rain Showers

Today 7 Jul Southwest Suffolk

Mostly cloudy. A chance of Showers in the morning. Humid with Highs in the upper 70s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 7 Jul Southwest Suffolk

Mostly cloudy. Lows in the mid 60s. North Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 1 July, 2026

    69.7 °F

  • Average July

    83.6 °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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