St Jones River water temperature
St Jones River, Dover, Delaware · River
The current water temperature at St Jones River is 23.0 °C (as of September 21, 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.
Water quality
Official EPA rating: poorMeasurement series & statistics
This measurement series includes 159 data points since July 23, 2026.
Lowest recorded value: 23.0 °C on September 15, 2026 · highest value: 29.7 °C on August 9, 2026.
In September, temperatures have ranged between 23.0 °C and 29.5 °C.
The current value is 3.5 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at St Jones River right now?
The current water temperature is 23.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at St Jones River?
Currently 23.0 °C (updated continuously).
How warm is at St Jones River in September?
In September, the water temperature recently averaged 26.5 °C.
When is the water warmest at St Jones River?
Across the measurement record, August is on average the warmest month (26.7 °C).
How is the water quality at St Jones River?
The official classification is: poor.
