Great South Bay Weather Forecast

    • 61
    • 75

    Increasing Clouds

    • 59
    • 70

    Mostly Sunny

    • 62
    • 70

    Mostly Sunny

    • 66
    • 72

    Chance Rain Showers

    • 67
    • 77

    Slight Chance Thunderstorms

    • 67
    • 76

    Slight Chance Thunderstorms

    • 65
    • 76

    Partly Sunny

Today 7 Jun Southwest Suffolk

Partly sunny with a 20 percent chance of Showers. Highs in the mid 80s. Northwest Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 7 Jun Southwest Suffolk

Mostly cloudy. Lows in the lower 60s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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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

    65.9 °F

  • Highest 5 June, 2026

    87.1 °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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