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Lake ZurichWater level today

399.66m a.s.l.

-1 cm since yesterday

Measured21 minutes ago

Limmat, Zürich Unterhard (outflow) · Bundesamt für Umwelt (BAFU)

Change across the visible readings

-1 cm

09/20 – 09/21

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View water balance →Year comparison →Temperature profile →
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Forecast

Source: FOEN forecast

The forecast value is expected to remain stable across the 6 displayed forecast days.

Today09/21399.66m a.s.l.
Tue09/22399.67m a.s.l.
Wed09/23399.67m a.s.l.
Thu09/24399.67m a.s.l.
Fri09/25399.67m a.s.l.
Sat09/26399.67m a.s.l.

Forecast

Source: FOEN forecast
  • Median
  • Min./Max.
  • Measured

The line shows the median of the FOEN model forecasts at each timestamp; the band shows their minimum and maximum. Daily cards average the available hourly medians, which is not a daily median. A wider band means greater spread between model paths, not guaranteed upper or lower limits. Partial days may contain fewer forecast values.

Today at the lake

The current picture

A factual data summary – not a safety or swimming clearance.

Water temperature

22.4 °C

Warm

Modelled

Wind

2.9 km/h

Calm

Measured

Precipitation, 24h

0.0 mm

Dry

Measured

What's happening?

Measured outflows exceed inflows

-10.2 m³/s

The level has been falling for a week.

-0.01 m ü. M. · over 7 days

Weather at the lake

15.0°Air temperature
0.0mmRain, last 24 h
2.9km/hWind
14.9–19.6°Day range

0.0 mm in 48 h · 7.8 mm over 7 days · Gusts 10.1 km/h · 73 % humidity

Source: MeteoSwiss, station Wädenswil · 1 hour ago

UV index

Low
0Daily maximum 4
Course of the day
912151821

No protection needed.

Source: Open-Meteo

Recent events

10 hours ago

Modelled lake temperature (1 m depth): new weekly low (22.1 °C)

12 hours ago

Schmerikon (Obersee): new weekly low (405.34 m a.s.l.)

13 hours ago

Modelled lake temperature (1 m depth): new weekly low (22.3 °C)

15 hours ago

Zürich: new weekly low (405.38 m a.s.l.)

yesterday

Zürich: new weekly low (405.39 m a.s.l.)

yesterday

Schmerikon (Obersee): new weekly low (405.35 m a.s.l.)

Stations

12 monitoring stations
Show monitoring stations
Aabach, Schmerikon (inflow) · CH0.0 m³/s41 minutes ago→Modelled lake temperature (1 m depth) · CH22.4 °C1 hour ago↓Limmat, Zürich Unterhard (outflow) · CH31.2 m³/s21 minutes ago→Limmat, Zürich Unterhard (outflow) · CH399.66 m a.s.l.21 minutes ago→Linthkanal, Benken (inflow) · CH20.9 m³/s41 minutes ago↓Schmerikon (Obersee) · CH405.34 m a.s.l.41 minutes ago→Sihl, Zürich (inflow) · CH1.9 m³/s21 minutes ago↓Sihl, Zürich (inflow) · CH412.23 m a.s.l.21 minutes ago→Sihl, Zürich (temperature) · CH18.1 °C21 minutes ago↓Steinenbach, Kaltbrunn (inflow) · CH0.1 m³/s41 minutes ago→Wagnerbach, Rapperswil-Jona (inflow) · CH0.0 m³/s41 minutes ago→Zürich · CH405.38 m a.s.l.21 minutes ago→

Webcams at Lake Zurich

Drag the timeline to compare the daily archive images.

Zürichsee

Zürichsee

Archive imageSep 21, 2026, 4:00 PM
Time travelSep 21, 2026, 4:00 PM
09/11Latest image
View original webcam

Understanding the water level

What is the water level of Lake Zurich? See the latest available level, its measurement time and source. Compare readings from the same station to understand the trend.

Reading in context

Putting Lake Zurich's current level in context

The main station at Limmat, Zürich Unterhard (outflow) reports a water level of 399.66 m a.s.l. at Sep 21, 2026, 9:50 PM. The series is provided by Bundesamt für Umwelt (BAFU). This value is the elevation of the water surface above the official height datum, not the water depth at the shore.

Comparison with the nearest valid readings gives -1 cm over 24 hours and -1 cm over seven days. These are net changes between two points in time; they prove neither a continuous rise or fall nor its cause.

Understanding Lake Zurich

Lake Zurich stretches from the city of Zurich to Rapperswil-Jona.

This overview includes 12 monitoring stations for water level, discharge, and water temperature. Not every station provides every measurement. Track changes at the same station, checking the timestamp, unit and source notes.

The curve shows recent level changes. A seasonal median, where available, compares the same time of year. Water can rise while remaining below that median: trend and comparison answer different questions. Neither replaces an official warning.

Measurement quality and sources

Data status

  • Measured — Recorded directly at a monitoring station.
  • Modelled — Computed by a scientific model (e.g. lake temperature from Alplakes), not measured on site.
  • Calculated — Derived from existing measurements, e.g. a balance or a change.
  • Archive image — Last archived image, not live.
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