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Lake HallwilWater level today

462.49m a.s.l.

0 cm since yesterday

Measured20 minutes ago

Aabach, Hitzkirch (inflow) · Bundesamt für Umwelt (BAFU)

Change across the visible readings

0 cm

09/20 – 09/21

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View water balance →Year comparison →Temperature profile →
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Today at the lake

The current picture

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

Water temperature

22.2 °C

Warm

Modelled

Wind

9.4 km/h

Calm

Measured

Precipitation, 24h

0.0 mm

Dry

Measured

What's happening?

The level has been falling for a week.

-0.01 m ü. M. · over 7 days

Weather at the lake

20.2°Air temperature
0.0mmRain, last 24 h
9.4km/hWind
9.6–20.2°Day range

0.0 mm in 48 h · 1.6 mm over 7 days · Gusts 22.0 km/h · 61 % humidity

Source: MeteoSwiss, station Mosen · 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 (21.8 °C)

13 hours ago

Modelled lake temperature (1 m depth): new weekly low (21.9 °C)

19 hours ago

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

yesterday

Meisterschwanden: new weekly low (448.07 m a.s.l.)

3 days ago

Modelled lake temperature (1 m depth): new weekly low (21.9 °C)

3 days ago

Modelled lake temperature (1 m depth): new weekly low (22.0 °C)

Stations

4 monitoring stations
Show monitoring stations
Aabach, Hitzkirch (inflow) · CH0.0 m³/s20 minutes ago→Aabach, Hitzkirch (inflow) · CH462.49 m a.s.l.20 minutes ago→Modelled lake temperature (1 m depth) · CH22.2 °C1 hour ago↓Meisterschwanden · CH448.07 m a.s.l.20 minutes ago→

Webcams at Lake Hallwil

Drag the timeline to compare the daily archive images.

Hallwilersee

Hallwilersee

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 Hallwil? 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 Hallwil's current level in context

The main station at Aabach, Hitzkirch (inflow) reports a water level of 462.49 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 0 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 Hallwil

Lake Hallwil lies between the cantons of Aargau and Lucerne.

This overview includes 4 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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