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Lake ZurichWater level today

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405.31m a.s.l.

+1 cm since yesterday

Measured17 minutes ago

Zürich · Bundesamt für Umwelt (BAFU)

Change across the visible readings

0 cm

11/06 – 11/07

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Level compared with usual

Very lowNormalVery high
usual range

Very low — 61 cm below the median — very low for this calendar day (reference period 1991-2020).

How unusual is this?

Values for this time of year are compared over 1991-2020. The middle 50% lie between 405.88 m a.s.l. and 405.95 m a.s.l.. Below the 5th-percentile boundary (405.85 m a.s.l.) is very low; above the 95th-percentile boundary (406.02 m a.s.l.) is very high.

This seasonal assessment uses published quantiles. It is not a return period or forecast and cannot count individual historical years.

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Data & tools for Lake Zurich

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How this assessment is made

Reading and sourceBundesamt für Umwelt (BAFU) · 17 minutes ago

Basis of comparisonSeasonal BAFU comparison values for the 1991-2020 reference period; not an official warning level.

CalculationSeepegel derives deviation and trend transparently from the listed measurements.

Zürich

Measurement at the lake. Inflow and outflow stations are identified separately.

Measurement time: Nov 7, 2026, 1:10 PM

Bundesamt für Umwelt (BAFU) ↗

Modelled lake temperature (1 m depth)

Alplakes model calculation, not a direct on-site measurement.

Operationelles Simstrat-1D-Modell von Alplakes/Eawag, Temperatur in 1 m Tiefe; modellierter Wert, keine lokale Messung

Measurement time: Nov 7, 2026, 11:00 AM

Alplakes (Eawag) – Simstrat-Modell ↗

Water temperature compared with usual

Very lowNormalVery high
usual range

Normal — Within the normal range for this calendar day (reference period 2023–2026).

How unusual is this?

Values for this time of year are compared over 2023–2026. The middle 50% lie between 12.2 °C and 13.5 °C. Below the 5th-percentile boundary (11.7 °C) is very low; above the 95th-percentile boundary (13.9 °C) is very high.

This seasonal assessment uses published quantiles. It is not a return period or forecast and cannot count individual historical years.

Das Delta der Wägitaler Aa im Obersee bei Lachen Mitte Oktober 2026

From the community

Lake Zurich

Das Delta der Wägitaler Aa im Obersee bei Lachen Mitte Oktober 2026

Location and viewing direction: Kiesstrand im Delta der Wägitaler Aa, Obersee, Richtung Mündung

Photo: Lichtbildwerkstatt · Taken:

Community photograph, not a live webcam image.

Forecast

Source: FOEN forecast

The forecast value is expected to rise by about 3 cm across the 6 displayed forecast days.

Today11/07405.31m a.s.l.
Sun11/08405.30m a.s.l.
Mon11/09405.30m a.s.l.
Tue11/10405.32m a.s.l.
Wed11/11405.33m a.s.l.
Thu11/12405.34m 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.

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Year comparison & records

View details →
  • Current year 2026
  • Previous year 2025
  • Median
  • 25th-75th percentile
  • Maximum / minimum

How to read the chart: the thick line is the current year, the thin one the median of the 1991-2020 reference period. The shaded band shows the normal range (25th–75th percentile), the dotted lines the maximum and minimum. Values above the band are unusually high for the season, below unusually low – but not an official warning.

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Today at the lake

The current picture

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

Water temperature

13.1 °C

Rather cool

Modelled

Wind

3.2 km/h

Calm

Measured

Precipitation, 24h

3.7 mm

Some rain

Measured

What's happening?

Measured inflows exceed outflows

+1.6 m³/s

The level has been rising for a week.

+0.02 m ü. M. · over 7 days

Weather at the lake

9.3°Air temperature
3.7mmRain, last 24 h
3.2km/hWind
7.6–9.3°Day range

3.7 mm in 48 h · 3.7 mm over 7 days · Gusts 6.8 km/h · 90 % humidity

Source: MeteoSwiss, station Wädenswil · 1 hour ago

UV index

Low
1Daily maximum 1
Course of the day
91215

No protection needed.

Source: Open-Meteo

Webcams at Lake Zurich

Drag the timeline to compare the daily archive images.

Zürichsee

Zürichsee

Archive imageNov 7, 2026, 11:00 AM
Time travelNov 7, 2026, 11:00 AM
10/28Latest 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.

Seepegel analysis

Putting Lake Zurich's current level in context

The main station at Zürich reports a water level of 405.31 m a.s.l. at Nov 7, 2026, 1:10 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.

Lake Zurich: what is a normal water level?

The median for the same calendar day is 405.92 m a.s.l.; the current value is 61 cm below it. The 405.88–405.95 m a.s.l. band contains the middle 50 percent of reference values from 1991-2020. Being outside it is less usual, but is not in itself a hazard level.

How is the reference level determined?

The reference comes from FOEN daily statistics for this calendar day. The seasonal median varies throughout the year and is not a fixed target level. The middle 50% is the range between the 25th and 75th percentiles, not a safety limit. The 30-day comparison describes only the recent development.

Comparison with the nearest valid readings gives +1 cm over 24 hours and +2 cm over seven days. These are net changes between two points in time; they prove neither a continuous rise or fall nor its cause.

Lake Zurich · At a glance

The large store at the end of the Linth system, shaped by Alpine inflow, a major city and regulation.

Profile and background
Area (approx.)
90 km²
Maximum depth (approx.)
136 m
Reference elevation
406 m
Shore municipalities (selection)
Zürich · Horgen · Rapperswil-Jona

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.