Peconic River at County HWY 105 at Riverhead, New York water temperature
Peconic River at County HWY 105 at Riverhead, New York · Sea/Coast
The current water temperature at Peconic River at County HWY 105 at Riverhead is 23.8 °C (as of September 20, 2026, source: USGS).
The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.
Measurement series & statistics
This measurement series includes 433 data points since July 22, 2026.
Lowest recorded value: 23.5 °C on September 18, 2026 · highest value: 29.2 °C on August 10, 2026.
In September, temperatures have ranged between 23.5 °C and 26.0 °C.
The current value is 1.0 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Peconic River at County HWY 105 at Riverhead right now?
The current water temperature is 23.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Peconic River at County HWY 105 at Riverhead?
Currently 23.8 °C (updated continuously).
How warm is at Peconic River at County HWY 105 at Riverhead in September?
In September, the water temperature recently averaged 24.8 °C.
When is the water warmest at Peconic River at County HWY 105 at Riverhead?
Across the measurement record, August is on average the warmest month (26.8 °C).
