Old Field Beach Weather Forecast

    • 62
    • 72

    Mostly Cloudy

    • 66
    • 75

    Decreasing Clouds

    • 60
    • 79

    Chance Rain Showers

    • 58
    • 69

    Mostly Sunny

    • 58
    • 66

    Slight Chance Rain Showers

    • 50
    • 67

    Mostly Sunny

    • 50
    • 58

    Mostly Sunny

Today 30 Sep Northwest Suffolk

Sunny. Highs around 60.

Tonight 30 Sep Northwest Suffolk

Mostly cloudy. Lows in the lower 60s. Southwest Winds around 5 Mph.

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Old Field Beach Temperature Statistics

September Temperature

Islip, Long Island Mac Arthur Airport (11.8 miles)

  • Lowest 15 September, 2026

    52.6 °F

  • Average September

    68.2 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (11.8 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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