Great South Bay Weather Forecast

    • 65
    • 71

    Rain Showers Likely

    • 68
    • 78

    Slight Chance Thunderstorms

    • 67
    • 76

    Slight Chance Thunderstorms

    • 67
    • 79

    Partly Sunny

    • 68
    • 77

    Mostly Cloudy

Today 10 Jun Southwest Suffolk

Mostly cloudy. A slight chance of Showers in the Morning, then a chance of Showers in the afternoon. Highs in the lower 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 10 Jun Southwest Suffolk

Mostly cloudy with a chance of Showers and Thunderstorms. Lows in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 2 June, 2026

    46.7 °F

  • Average June

    68.1 °F

  • Highest 5 June, 2026

    88.6 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    63 °F
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