Roslyn Harbor Weather Forecast

    • 66
    • 80

    Chance Thunderstorms

    • 64
    • 77

    Chance Rain Showers

    • 68
    • 83

    Partly Sunny

    • 70
    • 84

    Mostly Cloudy

    • 69
    • 82

    Chance Rain Showers

    • 68
    • 83

    Chance Thunderstorms

    • 68
    • 85

    Mostly Sunny

Today 29 Jul Northern Nassau

Showers likely with a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Highs around 80. West Winds 5 to 10 Mph, becoming north this afternoon. Chance of rain 60 percent.

Tonight 29 Jul Northern Nassau

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.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Roslyn Harbor Temperature Statistics

July Temperature

Farmingdale - Republic Airport (12.4 miles)

  • Lowest 20 July, 2026

    60.1 °F

  • Average July

    75.8 °F

  • Highest 3 July, 2026

    100.9 °F

Climate (2021–2026)

Farmingdale - Republic Airport (12.4 miles)

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

  • Average Low 2021–2026

    48.2 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    63.1 °F
Get WillyWeather+ to remove ads