Delaware River at Chester, Pennsylvania water temperature
Delaware River at Chester, Pennsylvania · River
The current water temperature at Delaware River at Chester is 24.4 °C (as of September 20, 2026, source: USGS).
A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.
Measurement series & statistics
This measurement series includes 146 data points since July 22, 2026.
Lowest recorded value: 24.4 °C on September 20, 2026 · highest value: 28.1 °C on August 9, 2026.
In September, temperatures have ranged between 24.4 °C and 26.5 °C.
The current value is 1.4 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Delaware River at Chester right now?
The current water temperature is 24.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Delaware River at Chester?
Currently 24.4 °C (updated continuously).
How warm is at Delaware River at Chester in September?
In September, the water temperature recently averaged 25.8 °C.
When is the water warmest at Delaware River at Chester?
Across the measurement record, July is on average the warmest month (27.0 °C).
