Altmühlsee water temperature

Altmühlsee, Altmühlsee Seepegel · Lake

The current water temperature at Altmühlsee is 21.1 °C (as of September 1, 2026, source: GKD Bayern).

Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.

21.1 °C

Measured: September 1, 2026 · continuously updated

💧 Water 21.1° · ☀️ Air 14.6° · high today 21.9°

Temperature trend of recent weeks

Altmühlsee — Photo: Mkummerer · CC BY-SA 3.0 · Wikimedia Commons

Water quality

EU classification: excellent

Measurement series & statistics

This measurement series includes 495 data points since July 4, 2026.

Lowest recorded value: 19.8 °C on August 26, 2026 · highest value: 27.8 °C on July 16, 2026.

Nearby waters

Kleiner Brombachsee, Brombachsee Vorsperre · 11.3 km away20.5 °C Fränkische Rezat, Wernfels · 13.3 km away19.7 °C Schwäbische Rezat, Mühlstetten · 20.1 km away15.7 °C Aurach, Rothaurach · 26.2 km away17.3 °C Altmühl, Eichstätt · 43.0 km away18.3 °C

Frequently asked questions

Can you swim at Altmühlsee right now?
The current water temperature is 21.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Altmühlsee?
Currently 21.1 °C (updated continuously).

How is the water quality at Altmühlsee?
The official classification is: excellent.

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