Heckscher State Park Weather Forecast

    • 67
    • 77

    Increasing Clouds

    • 68
    • 79

    Partly Sunny

    • 71
    • 80

    Partly Sunny

    • 72
    • 85

    Mostly Sunny

    • 73
    • 86

    Mostly Sunny

    • 67
    • 82

    Slight Chance Thunderstorms

Today 20 Jun Southwest Suffolk

Sunny. Highs in the lower 80s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 20 Jun Southwest Suffolk

Partly cloudy. Lows in the upper 60s. West Winds 10 to 15 Mph.

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Heckscher State Park Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (6.2 miles)

  • Lowest 2 June, 2025

    49.6 °F

  • Average June

    67.6 °F

  • Highest 12 June, 2025

    87.1 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (6.2 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63 °F
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