Great South Bay Weather Forecast

    • 59
    • 69

    Becoming Sunny

    • 61
    • 69

    Partly Sunny

    • 64
    • 70

    Rain Showers Likely

    • 68
    • 78

    Slight Chance Thunderstorms

    • 67
    • 76

    Slight Chance Thunderstorms

    • 65
    • 75

    Partly Sunny

    • 67
    • 76

    Mostly Cloudy

Today 8 Jun Southwest Suffolk

Sunny. Highs in the lower 70s. South Winds around 10 Mph.

Tonight 8 Jun Southwest Suffolk

Clear. Lows in the upper 50s. Southwest Winds 5 to 10 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

    67 °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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