Altenau water temperature
Altenau, Nordborchen · River
The current water temperature at Altenau is 9.9 °C (as of October 16, 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.
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Measurement series & statistics
This measurement series includes 465 data points since August 17, 2026.
Lowest recorded value: 9.4 °C on October 13, 2026 · highest value: 12.5 °C on August 27, 2026.
In October, temperatures have ranged between 9.4 °C and 12.2 °C.
The current value is 0.2 °C below the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Altenau right now?
The current water temperature is 9.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Altenau?
Currently 9.9 °C (updated continuously).
How warm is at Altenau in October?
In October, the water temperature recently averaged 10.1 °C.
When is the water warmest at Altenau?
Across the measurement record, August is on average the warmest month (11.3 °C).
