Long Beach (Stony Brook) Weather Forecast

    • 67
    • 77

    Chance Thunderstorms

    • 66
    • 75

    Chance Rain Showers

    • 68
    • 80

    Mostly Sunny

    • 70
    • 80

    Mostly Cloudy

    • 69
    • 80

    Chance Rain Showers

    • 69
    • 81

    Chance Rain Showers

    • 68
    • 81

    Slight Chance Rain Showers

Today 29 Jul Northwest Suffolk

Mostly cloudy with Showers likely with a chance of Thunderstorms this Morning, then partly sunny with a chance of Showers and Thunderstorms this afternoon. Some Thunderstorms may produce heavy rainfall. Highs in the upper 70s. South Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming east this afternoon. Chance of rain 70 percent.

Tonight 29 Jul Northwest Suffolk

Mostly cloudy. A chance of Showers and Thunderstorms this Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall this evening. Some Thunderstorms may produce heavy rainfall after midnight. Lows in the mid 60s. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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Long Beach (Stony Brook) Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (9.3 miles)

  • Lowest 24 July, 2026

    58.6 °F

  • Average July

    75.2 °F

  • Highest 3 July, 2026

    98.7 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (9.3 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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