Mount Sinai Harbor Weather Forecast

    • 23
    • 30

    Cloudy

    • 8
    • 26

    Blustery

    • 11
    • 18

    Blustery

    • 17
    • 24

    Partly Sunny

    • 24
    • 28

    Mostly Cloudy

    • 29
    • 34

    Chance Rain

Today 6 Feb Northwest Suffolk

Mostly cloudy. Highs around 30. Northeast Winds 5 to 10 Mph, becoming east this afternoon.

Tonight 6 Feb Northwest Suffolk

Cloudy. A chance of snow in the Evening, then snow after midnight. Snow accumulation around an inch. Lows in the lower 20s. South Winds around 5 Mph, becoming west with Gusts up to 20 Mph after midnight. Chance of snow 80 percent.

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Mount Sinai Harbor Temperature Statistics

February Temperature

Islip, Long Island Mac Arthur Airport (11.8 miles)

  • Lowest 1 February, 2026

    12 °F

  • Average February

    21.2 °F

  • Highest 2 February, 2026

    32 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (11.8 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63 °F
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