Smithtown Bay Weather Forecast

    • 74
    • 82

    Chance Thunderstorms

    • 71
    • 81

    Mostly Sunny

    • 72
    • 80

    Mostly Sunny

    • 73
    • 85

    Slight Chance Rain Showers

    • 69
    • 79

    Slight Chance Thunderstorms

    • 68
    • 79

    Chance Rain Showers

Today 14 Aug Northwest Suffolk

Patchy fog in the morning. Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms in the Morning, then partly sunny with a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the mid 80s. West Winds around 5 Mph, becoming northeast in the afternoon. Chance of rain 50 percent.

Tonight 14 Aug Northwest Suffolk

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear with a slight chance of Showers and Thunderstorms after midnight. Humid with Lows around 70. Northeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Smithtown Bay Temperature Statistics

August Temperature

Islip, Long Island Mac Arthur Airport (11.2 miles)

  • Lowest 9 August, 2025

    56.6 °F

  • Average August

    73.1 °F

  • Highest 4 August, 2025

    89.7 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (11.2 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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