Connecticut River water temperature
Connecticut River, Old Lyme, Connecticut · Sea/Coast
The current water temperature at Connecticut River is 14.3 °C (as of November 6, 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 483 data points since September 7, 2026.
Lowest recorded value: 12.3 °C on November 2, 2026 · highest value: 24.3 °C on September 10, 2026.
In November, temperatures have ranged between 12.3 °C and 15.9 °C.
The current value is 0.4 °C above the November average of this series.
Nearby waters
More measuring points: Connecticut River
Frequently asked questions
Can you swim at Connecticut River right now?
The current water temperature is 14.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Connecticut River?
Currently 14.3 °C (updated continuously).
How warm is at Connecticut River in November?
In November, the water temperature recently averaged 13.9 °C.
When is the water warmest at Connecticut River?
Across the measurement record, September is on average the warmest month (21.1 °C).
