Ossiacher See, Ossiach · Lake
The current water temperature at Ossiacher See is 24.4 °C (as of August 31, 2026, source: Eawag/Alplakes model).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
This measurement series includes 478 data points since July 3, 2026.
Lowest recorded value: 24.1 °C on August 26, 2026 · highest value: 27.6 °C on August 5, 2026.
Can you swim at Ossiacher See right now?
The current water temperature is 24.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ossiacher See?
Currently 24.4 °C (updated continuously).
How is the water quality at Ossiacher See?
The official classification is: excellent.