Lake GreifenWater level today

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434.66m a.s.l.

0 cm since yesterday

Measured16 minutes ago

Greifensee · Kanton Zürich (AWEL) – HydroPro

Change across the visible readings

0 cm

11/07 – 11/08

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Data & tools for Lake Greifen

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How this assessment is made

Reading and sourceKanton Zürich (AWEL) – HydroPro · 16 minutes ago

Basis of comparisonCurrent official reading and matching readings from the same station.

CalculationSeepegel derives deviation and trend transparently from the listed measurements.

Greifensee

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

Amtlicher Seepegel, Kanton Zürich AWEL, Station LH 2082

Measurement time: Nov 8, 2026, 2:30 PM

Kanton Zürich (AWEL) – HydroPro ↗

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 8, 2026, 2:00 PM

Alplakes (Eawag) – Simstrat-Modell ↗

7-day trendCalculated-2cmThe level is falling.Detailed readings Water temperatureModelled11.8°CStill cold for swimming · modelled value at 1 m depthSource: Alplakes (Eawag) – Simstrat-Modell, measurement site Modellierte Seetemperatur (1 m Tiefe) · 46 minutes ago · also measured at Aabach, Mönchaltorf (Temperatur): 11.4 °CTemperature profile WeatherMeasured11.2°C0.0 mm rain in 24 hZürich / Affoltern · 46 minutes agoWeather history Water balanceCalculated-0.5m³/sMeasured outflows exceed inflowsInflows and outflows

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 10.9 °C and 12.4 °C. Below the 5th-percentile boundary (10.3 °C) is very low; above the 95th-percentile boundary (13.0 °C) is very high.

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

Lake and river photos · Lake Greifen

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Today at the lake

The current picture

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

Water temperature

11.8 °C

Rather cool

Modelled

Wind

5.0 km/h

Calm

Measured

Precipitation, 24h

0.0 mm

Dry

Measured

What's happening?

Measured outflows exceed inflows

-0.5 m³/s

The level has been falling for a week.

-0.02 m ü. M. · over 7 days

Weather at the lake

11.2°Air temperature

0.0mmRain, last 24 h

5.0km/hWind

3.6–11.2°Day range

1.5 mm in 48 h · 1.5 mm over 7 days · Gusts 11.5 km/h · 69 % humidity

Source: MeteoSwiss, station Zürich / Affoltern · 46 minutes ago

UV index

Low

2Daily maximum 2

Course of the day

No protection needed.

Source: Open-Meteo

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What has changed?

3 hours ago

Modelled lake temperature (1 m depth): new weekly low (11.6 °C)

6 hours ago

Modelled lake temperature (1 m depth): new weekly low (11.7 °C)

9 hours ago

Modelled lake temperature (1 m depth): new weekly low (11.7 °C)

11 hours ago

↓Aabach, Mönchaltorf (inflow): reading fell by 0.0 m³/s

12 hours ago

Modelled lake temperature (1 m depth): new weekly low (11.8 °C)

yesterday

Modelled lake temperature (1 m depth): new weekly low (11.8 °C)

Stations

6 monitoring stations

Show monitoring stations

Aabach, Mönchaltorf (inflow) · CH0.2 m³/s16 minutes ago→Aabach, Mönchaltorf (temperature) · CH11.4 °C16 minutes ago→Modelled lake temperature (1 m depth) · CH11.8 °C46 minutes ago↑Glatt, Dübendorf (outflow) · CH0.7 m³/s16 minutes ago→Glatt, Dübendorf (temperature) · CH11.9 °C16 minutes ago→Greifensee · CH434.66 m a.s.l.16 minutes ago→

Webcams at Lake Greifen

Drag the timeline to compare the daily archive images.

Greifensee: Schloss Greifensee

Archive imageNov 8, 2026, 11:00 AM

Time travelNov 8, 2026, 11:00 AM

10/28Latest image

View original webcam

Understanding the water level

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

Seepegel analysis

Putting Lake Greifen's current level in context

The main station at Greifensee reports a water level of 434.66 m a.s.l. at Nov 8, 2026, 2:30 PM. The series is provided by Kanton Zürich (AWEL) – HydroPro. 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 0 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 Greifen · At a glance

An unregulatable lake in the upper Glatt valley, where inflows, outflow and water layering explain more than an assumed target level.

Profile and background

Area (approx.): 8.5 km²
Maximum depth (approx.): 32 m
Reference elevation: 435 m
Shore municipalities (selection): Greifensee · Maur · Uster

Understanding Lake Greifen

Lake Greifen lies east of Zurich between the Pfannenstiel ridge and the Zurich Oberland.

This overview includes 6 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.