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Lake LucerneWater level today

443.05m a.s.l.

-1 cm since yesterday

Measured21 minutes ago

Engelberger Aa, Buochs (inflow) · Bundesamt für Umwelt (BAFU)

Change across the visible readings

-2 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

20.9 °C

Pleasant

Modelled

Wind

7.2 km/h

Calm

Measured

Precipitation, 24h

0.0 mm

Dry

Measured

What's happening?

Measured inflows exceed outflows

+2.3 m³/s

The level has been falling for a week.

-0.20 m ü. M. · over 7 days

Weather at the lake

16.5°Air temperature
0.0mmRain, last 24 h
7.2km/hWind
12.2–21.2°Day range

0.0 mm in 48 h · 11.1 mm over 7 days · Gusts 14.4 km/h · 70 % humidity

Source: MeteoSwiss, station Luzern · 1 hour ago

UV index

Low
0Daily maximum 5
Course of the day
912151821

No protection needed.

Source: Open-Meteo

Recent events

1 hour ago

Reuss, Luzern (outflow): new weekly low (430.86 m a.s.l.)

3 hours ago

↑Muota, Ingenbohl (inflow): reading rose by +2.6 m³/s

4 hours ago

Reuss, Luzern (outflow): new weekly low (41.3 m³/s)

5 hours ago

Reuss, Luzern (outflow): new weekly low (41.4 m³/s)

5 hours ago

Reuss, Luzern (outflow): new weekly low (41.5 m³/s)

5 hours ago

Reuss, Luzern (outflow): new weekly low (41.6 m³/s)

Stations

17 monitoring stations
Show monitoring stations
Modelled lake temperature (1 m depth) · CH20.9 °C1 hour ago↓Engelberger Aa, Buochs (inflow) · CH6.1 m³/s21 minutes ago↑Engelberger Aa, Buochs (inflow) · CH443.05 m a.s.l.21 minutes ago→Engelberger Aa, Buochs, Flugplatz (temperature) · CH10.5 °C21 minutes ago↓Grosstalbach, Isenthal (temperature) · CH9.4 °C21 minutes ago↓Luzern · CH433.41 m a.s.l.21 minutes ago↑Muota, Ingenbohl (inflow) · CH9.5 m³/s21 minutes ago→Muota, Ingenbohl (inflow) · CH434.92 m a.s.l.21 minutes ago→Muota, Ingenbohl (temperature) · CH12.3 °C21 minutes ago↑Reuss, Andermatt (inflow, upper course) · CH3.0 m³/s21 minutes ago↑Reuss, Andermatt (inflow, upper course) · CH1,426.60 m a.s.l.21 minutes ago↑Reuss, Luzern (outflow) · CH41.4 m³/s21 minutes ago↑Reuss, Luzern (outflow) · CH430.87 m a.s.l.21 minutes ago↑Reuss, Luzern, Geissmattbrücke (temperature) · CH20.5 °C21 minutes ago→Reuss, Seedorf (inflow) · CH28.1 m³/s21 minutes ago↑Reuss, Seedorf (inflow) · CH437.44 m a.s.l.21 minutes ago↑Reuss, Seedorf (temperature) · CH11.2 °C21 minutes ago↓

Webcams at Lake Lucerne

Drag the timeline to compare the daily archive images.

Vierwaldstättersee / Alpnachersee

Vierwaldstättersee / Alpnachersee

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 Lucerne? 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 Lucerne's current level in context

The main station at Engelberger Aa, Buochs (inflow) reports a water level of 443.05 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 -20 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 Lucerne

Lake Lucerne lies at the heart of Switzerland, known for its branching shape.

This overview includes 17 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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