Heder water temperature
Heder, Upsprunge · River
The current water temperature at Heder is 13.0 °C (as of September 20, 2026, source: LANUV NRW).
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 468 data points since July 22, 2026.
Lowest recorded value: 12.7 °C on July 25, 2026 · highest value: 13.8 °C on August 8, 2026.
In September, temperatures have ranged between 12.8 °C and 13.7 °C.
The current value is 0.1 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Heder right now?
The current water temperature is 13.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Heder?
Currently 13.0 °C (updated continuously).
How warm is at Heder in September?
In September, the water temperature recently averaged 13.1 °C.
When is the water warmest at Heder?
Across the measurement record, August is on average the warmest month (13.3 °C).
