Alte Donau, Gänsehäufel Süd, Wien (Donaustadt) · Lake
The current water temperature at Alte Donau is 25.1 °C (as of August 17, 2026, source: AGES).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
Can you swim at Alte Donau right now?
The current water temperature is 25.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Alte Donau?
Currently 25.1 °C (updated continuously).
How is the water quality at Alte Donau?
The official classification is: excellent.