Islip Weather Forecast

    • 28
    • 43

    Decreasing Clouds

    • 40
    • 47

    Partly Sunny

    • 44
    • 57

    Chance Rain

    • 49
    • 60

    Slight Chance Rain

    • 40
    • 62

    Rain Likely

    • 36
    • 49

    Rain/Snow Likely

Today 28 Mar Southwest Suffolk

Mostly sunny. Highs in the lower 40s. North Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 28 Mar Southwest Suffolk

Mostly clear. Lows in the upper 20s. Northwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening.

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Islip Temperature Statistics

March Temperature

Islip, Long Island Mac Arthur Airport (6.8 miles)

  • Lowest 3 March, 2026

    18.6 °F

  • Average March

    41.6 °F

  • Highest 9 March, 2026

    68.6 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (6.8 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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