Mount Sinai Harbor Weather Forecast

    • 34
    • 50

    Slight Chance Rain Showers

    • 43
    • 50

    Partly Sunny

    • 46
    • 53

    Slight Chance Rain Showers

    • 48
    • 60

    Partly Sunny

    • 46
    • 59

    Partly Sunny

    • 46
    • 57

    Chance Rain Showers

Today 20 Apr Northwest Suffolk

Partly sunny. A chance of rain Showers, mainly this morning. Highs in the lower 50s. Northwest Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 20 Apr Northwest Suffolk

Partly cloudy in the Evening, then clearing. Lows in the lower 30s. North Winds 10 to 15 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Sinai Harbor Temperature Statistics

April Temperature

Islip, Long Island Mac Arthur Airport (11.8 miles)

  • Lowest 9 April, 2026

    27.6 °F

  • Average April

    52.7 °F

  • Highest 16 April, 2026

    82.7 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (11.8 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