Heckscher State Park Weather Forecast

    • 44
    • 62

    Sunny

    • 51
    • 66

    Sunny

    • 47
    • 59

    Mostly Sunny

    • 51
    • 60

    Partly Sunny

    • 55
    • 65

    Mostly Sunny

    • 54
    • 68

    Mostly Sunny

    • 55
    • 65

    Mostly Cloudy

Today 25 Oct Southwest Suffolk

Mostly cloudy in the Morning, then becoming partly sunny. Highs in the mid 60s.

Tonight 25 Oct Southwest Suffolk

Clear. Lows in the lower 40s. West Winds 5 to 10 Mph.

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Heckscher State Park Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (6.2 miles)

  • Lowest 19 October, 2026

    38.6 °F

  • Average October

    59.5 °F

  • Highest 14 October, 2026

    82.7 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (6.2 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    63 °F
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