Lake water levels

The FOEN measures the current water levels of Swiss lakes, makes predictions and informs the public.

The water levels of over 175 natural lakes and reservoirs in Switzerland depend on various influential factors. In addition to long-term climate change, precipitation, water withdrawals and inflow and discharge capacities play important roles in the short term. However, the water levels are especially influenced by lake regulation. All large Swiss lakes are regulated, except for Lake Constance and Lake Walensee.

The FOEN measures the current water levels of Swiss lakes, makes predictions and publishes flood warnings.

Hydrological data - FOEN

Seeregulierung - Hintergrundinformationen zu den Seeregulierungen

Swiss Federal Office of Energy SFOE: Electricity statistics - water levels of reservoirs

Actual flood risk in Switzerland - Flood alert map for rivers and lakes of national interest

Bodensee-Plattform - Hochwasservorhersage für den Bodensee

Cantone TI: OASI - Idrologia - Water level data of Lago Maggiore