Riverhead Weather Forecast
- 71
- 89
Chance Thunderstorms
- 68
- 87
Mostly Sunny
- 70
- 83
Chance Thunderstorms
- 69
- 84
Chance Thunderstorms
- 68
- 83
Partly Sunny
- 70
- 82
Slight Chance Rain Showers
Today 17 Jul Northeast Suffolk
Patchy fog in the morning. Partly sunny with a chance of Showers and Thunderstorms. Some Thunderstorms may produce gusty Winds and heavy rainfall. Humid with Highs in the upper 80s. Southwest Winds 10 to 15 Mph. Chance of rain 50 percent. Heat index Values up to 100 in the afternoon.
Tonight 17 Jul Northeast Suffolk
Partly cloudy. A chance of Thunderstorms with a slight chance of Showers in the evening. Some Thunderstorms may produce gusty Winds and heavy rainfall in the evening. Humid with Lows in the lower 70s. Southwest Winds 10 to 15 Mph, becoming west after midnight. Chance of rain 30 percent.
Riverhead Temperature Statistics
July Temperature
The Gabreski Airport (5 miles)
Lowest 4 July, 2025
54.6 °FAverage July
74.7 °FHighest 8 July, 2025
88.6 °F
Climate (2020–Present)
The Gabreski Airport (5 miles)
Average Low 2020–2025
44.2 °FAverage 2020–2025
53.7 °FAverage High 2020–2025
62.2 °F