Ammersee water temperature
Ammersee, Stegen · Lake
The current water temperature at Ammersee is 18.6 °C (as of September 20, 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.
Water quality
EU classification: goodMeasurement series & statistics
This measurement series includes 410 data points since July 22, 2026.
Lowest recorded value: 18.6 °C on September 19, 2026 · highest value: 27.9 °C on August 4, 2026.
In September, temperatures have ranged between 18.6 °C and 23.3 °C.
The current value is 2.6 °C below the September average of this series.
Nearby waters
More measuring points: Ammersee
Frequently asked questions
Can you swim at Ammersee right now?
The current water temperature is 18.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ammersee?
Currently 18.6 °C (updated continuously).
How warm is at Ammersee in September?
In September, the water temperature recently averaged 21.2 °C.
When is the water warmest at Ammersee?
Across the measurement record, August is on average the warmest month (23.4 °C).
How is the water quality at Ammersee?
The official classification is: good.
