Smithtown Bay Weather Forecast

    • 20
    • 32

    Breezy

    • 18
    • 22

    Blustery

    • 32
    • 38

    Mostly Cloudy

    • 23
    • 37

    Slight Chance Rain/Snow

    • 22
    • 30

    Mostly Cloudy

    • 16
    • 29

    Chance Snow

Today 19 Jan Northwest Suffolk

Mostly sunny. Highs in the lower 30s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 19 Jan Northwest Suffolk

Partly cloudy in the Evening, then clearing. Lows around 16. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Smithtown Bay Temperature Statistics

January Temperature

Islip, Long Island Mac Arthur Airport (11.2 miles)

  • Lowest 1 January, 2026

    21 °F

  • Average January

    36.7 °F

  • Highest 9 January, 2026

    51.1 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (11.2 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    63.1 °F
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