Norwalk Harbor water temperature
Norwalk Harbor, the Cove Marina near E Norwalk, Connecticut · Sea/Coast
The current water temperature at Norwalk Harbor is 21.0 °C (as of September 21, 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.
Water quality
Official EPA rating: goodMeasurement series & statistics
This measurement series includes 100 data points since August 26, 2026.
Lowest recorded value: 21.0 °C on September 21, 2026 · highest value: 24.6 °C on September 4, 2026.
In September, temperatures have ranged between 21.0 °C and 24.6 °C.
The current value is 2.4 °C below the September average of this series.
Nearby waters
More measuring points: Norwalk Harbor
Frequently asked questions
Can you swim at Norwalk Harbor right now?
The current water temperature is 21.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Norwalk Harbor?
Currently 21.0 °C (updated continuously).
How warm is at Norwalk Harbor in September?
In September, the water temperature recently averaged 23.4 °C.
How is the water quality at Norwalk Harbor?
The official classification is: good.
