Ossiacher See, Annenheim water temperature

Ossiacher See, Annenheim, Treffen · Lake

The current water temperature at Ossiacher See is 24.9 °C (as of September 1, 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.

24.9 °C

Measured: September 1, 2026 · continuously updated

💧 Water 24.9° · ☀️ Air 12.9° · high today 21.5°

Temperature trend of recent weeks

Ossiacher See, Annenheim — Photo: JJ55 · CC BY-SA 3.0 · Wikimedia Commons

Water quality

EU classification: excellent · Visibility depth: 3.0 m

Measurement series & statistics

This measurement series includes 471 data points since July 5, 2026.

Lowest recorded value: 23.0 °C on July 27, 2026 · highest value: 28.2 °C on August 4, 2026.

Nearby waters

Ossiacher See, St. Andrä · 0.8 km away24.9 °C Ossiacher See, bikebeach Seebad St. Andrä, Villach · 1.8 km away24.9 °C Ossiacher See, Heiligengestade, Villach · 2.5 km away24.9 °C Silbersee, Villach, Villach · 5.6 km away26.6 °C Ossiacher See, Seebad Bodensdorf · 6.1 km away24.9 °C

Frequently asked questions

Can you swim at Ossiacher See right now?
The current water temperature is 24.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Ossiacher See?
Currently 24.9 °C (updated continuously).

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

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