Lake Constance water temperature

Lake Constance, Strandbad Horn, Gaienhofen · Lido

The current water temperature at Lake Constance is 21.0 °C (as of September 20, 2026, source: official monitoring networks).

Pools and lidos follow their own rules — heated, spring-fed or sun-dependent. Here the operator's on-site report is what counts.

21.0 °C

Measured: September 20, 2026 · continuously updated

💧 Water 21.0° · ☀️ Air 18.4° · high today 22.9°

Temperature trend of recent weeks

Lake Constance — Photo: Rebeca Diez · CC BY-SA 4.0 · Wikimedia Commons

Water quality

EU classification: excellent

Measurement series & statistics

This measurement series includes 49 data points since September 5, 2026.

Lowest recorded value: 21.0 °C on September 18, 2026 · highest value: 23.0 °C on September 5, 2026.

In September, temperatures have ranged between 21.0 °C and 23.0 °C.

The current value is 1.3 °C below the September average of this series.

Nearby waters

Lake Constance, Badi Berlingen · 2.0 km away21.0 °C Lake Constance, Strandbad Steckborn · 3.6 km away21.0 °C Lake Constance, Strandbad Iznang · 4.0 km away21.0 °C Lake Constance, Strandbad Mettnau, Radolfzell · 4.7 km away21.0 °C Lake Constance, Strandbad Reichenau · 4.9 km away21.0 °C

More measuring points: Lake Constance

Bregenz (Bodensee)21.4 °C Alte Badi Horn21.0 °C Aquastaad, Immenstaad21.0 °C Badi Altnau21.0 °C Badi Berlingen21.0 °C Badi Ermatingen21.0 °C

Frequently asked questions

Can you swim at Lake Constance right now?
The current water temperature is 21.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Lake Constance?
Currently 21.0 °C (updated continuously).

How warm is at Lake Constance in September?
In September, the water temperature recently averaged 22.3 °C.

How is the water quality at Lake Constance?
The official classification is: excellent.

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