Great South Bay Weather Forecast

    • 68
    • 76

    Rain Showers Likely

    • 66
    • 77

    Rain Showers

    • 67
    • 77

    Partly Sunny

    • 69
    • 78

    Partly Sunny

    • 71
    • 78

    Slight Chance Rain Showers

    • 72
    • 80

    Slight Chance Rain Showers

Today 26 Jun Southwest Suffolk

Partly sunny with a slight chance of Showers early this Morning, then mostly cloudy this afternoon. Highs in the upper 70s. Southwest Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

Tonight 26 Jun Southwest Suffolk

Mostly cloudy. A chance of Showers after midnight. Lows in the upper 60s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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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

    71.1 °F

  • Highest 12 June, 2026

    94.6 °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 °F
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