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Anterior Rhine – Water level, Discharge & Water temperature

Anterior Rhine is measured at 3 measuring stations and touches Lake Constance.

Current situation

Anterior Rhine at Ilanz (inflow, headwater) is currently flowing at 4.7 m³/s. Compared with yesterday’s daily average (Coordinated Universal Time, UTC): fallen; currently below the 30-day median.

Discharge4.7 m³/s
Water level690.64 m a.s.l.
Water temperature10.5 °C

Reference: 30 available daily means from the last 30 complete days (Coordinated Universal Time, UTC), compared with the current individual value. Being close to the median does not describe the spread of values. Gaps can affect daily means. This is neither a seasonal normal nor an official danger level.

How this assessment is made

Reading and sourceBundesamt für Umwelt (BAFU) · 18 minutes ago

Basis of comparisonCurrent reading, previous day and available 30-day daily means from the same reference station.

CalculationSeepegel uses the highest-flowing current reference station; stations along a river are not added together.

Vorderrhein, Ilanz (inflow, headwater)

Inflow to the lake: this value describes the river, not the lake level.

Einer der beiden Quellflüsse des Rheins (mit Hinterrhein), rund 100 km oberhalb des Bodensees (Station BAFU Nr. 2033)

Measurement time: Oct 4, 2026, 3:20 AM

Bundesamt für Umwelt (BAFU) ↗

Discharge over the last 30 days

One line per station. Differences are not a direct inflow balance: measurement times, travel times, storage, withdrawals and tributaries can affect the values.

Ilanz (Zufluss, Quellfluss)

Water level, last 30 days

One line per station. Elevation levels and local centimetre gauges are shown separately.

Ilanz (Zufluss, Quellfluss)

Water temperature, last 30 days

One line per station with a temperature probe.

Ilanz (Temperatur)

What has changed?

7 hours ago

↓Vorderrhein, Ilanz (inflow, headwater): reading fell by -0.19 m a.s.l.

12 hours ago

Vorderrhein, Ilanz (inflow, headwater): new weekly low (2.4 m³/s)

12 hours ago

Vorderrhein, Ilanz (inflow, headwater): new weekly low (2.5 m³/s)

18 hours ago

↓Vorderrhein, Ilanz (temperature): reading fell by -2.1 °C

19 hours ago

↓Vorderrhein, Ilanz (inflow, headwater): reading fell by -23.5 m³/s

yesterday

↑Vorderrhein, Ilanz (inflow, headwater): reading rose by +0.13 m a.s.l.

Stations on the map

Each marker opens the corresponding station details.

Connected lakes

Water knowledge

Understanding Anterior Rhine

Anterior Rhine: this overview puts the available stations and measurements in context. The exact location matters, not just the water body's name.

This overview includes 3 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. Related waters in this overview: Lake Constance.

Discharge in m³/s is a volume per second, not the speed of the current. Station comparisons must account for location, measurement time and water travel time. A higher reading is neither automatically a flood warning nor an indication that the river is navigable.