Riverhead Weather Forecast

    • 62
    • 83

    Rain Showers

    • 56
    • 72

    Rain Showers

    • 57
    • 75

    Partly Sunny

    • 58
    • 74

    Chance Rain Showers

    • 58
    • 73

    Chance Rain Showers

    • 56
    • 78

    Partly Sunny

Today 6 Sep Northeast Suffolk

Partly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the lower 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 6 Sep Northeast Suffolk

Showers likely with a chance of Thunderstorms in the Evening, then Showers with isolated Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Lows around 60. Southwest Winds 10 to 15 Mph, becoming north 5 to 10 Mph after midnight. Chance of rain 80 percent.

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Riverhead Temperature Statistics

September Temperature

The Gabreski Airport (5 miles)

  • Lowest 3 September, 2025

    48.9 °F

  • Average September

    65.6 °F

  • Highest 1 September, 2025

    75 °F

Climate (2020–Present)

The Gabreski Airport (5 miles)

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  • Average Low 2020–2025

    44.1 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    62.2 °F
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