Great South Bay Weather Forecast

    • 65
    • 76

    Rain Showers

    • 63
    • 74

    Partly Sunny

    • 63
    • 72

    Partly Sunny

    • 64
    • 72

    Slight Chance Thunderstorms

    • 69
    • 78

    Chance Rain Showers

    • 67
    • 77

    Chance Rain Showers

Today 14 Jun Southwest Suffolk

Sunny in the Morning, then becoming partly sunny. Highs in the mid 80s. Southwest Winds 5 to 10 Mph, increasing to south 15 to 20 Mph with Gusts up to 30 Mph in the afternoon.

Tonight 14 Jun Southwest Suffolk

Mostly cloudy. Showers with a chance of Thunderstorms in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the mid 60s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 90 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

    68.6 °F

  • Highest 11 June, 2026

    90 °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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