Ossiacher See, Annenheim water temperature
Ossiacher See, Annenheim, Treffen · Lake
The current water temperature at Ossiacher See is 17.1 °C (as of October 16, 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.
Water quality
EU classification: excellent · Visibility depth: 3.0 mMeasurement series & statistics
This measurement series includes 477 data points since August 17, 2026.
Lowest recorded value: 16.6 °C on October 16, 2026 · highest value: 26.1 °C on August 19, 2026.
In October, temperatures have ranged between 16.6 °C and 19.6 °C.
The current value is 1.1 °C below the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Ossiacher See right now?
The current water temperature is 17.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ossiacher See?
Currently 17.1 °C (updated continuously).
How warm is at Ossiacher See in October?
In October, the water temperature recently averaged 18.2 °C.
When is the water warmest at Ossiacher See?
Across the measurement record, August is on average the warmest month (24.3 °C).
How is the water quality at Ossiacher See?
The official classification is: excellent.
