Long Beach (Stony Brook) Weather Forecast

    • 59
    • 86

    Rain Showers Likely

    • 54
    • 68

    Rain Showers Likely

    • 52
    • 67

    Rain Showers

    • 53
    • 62

    Rain Showers

    • 56
    • 67

    Chance Rain Showers

    • 59
    • 73

    Slight Chance Rain Showers

Today 20 May Northwest Suffolk

Sunny this Morning, then partly sunny with a chance of Showers and Thunderstorms this afternoon. Highs in the upper 80s. West Winds 5 to 10 Mph. Gusts up to 20 Mph this afternoon. Chance of rain 50 percent.

Tonight 20 May Northwest Suffolk

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the upper 50s. North Winds 5 to 10 Mph. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Long Beach (Stony Brook) Temperature Statistics

May Temperature

Islip, Long Island Mac Arthur Airport (9.3 miles)

  • Lowest 1 May, 2026

    40.6 °F

  • Average May

    57.5 °F

  • Highest 17 May, 2026

    82.9 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (9.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    63 °F
Get WillyWeather+ to remove ads