Gauge Bonn: current water level and draft

Water level at the Bonn gauge

On 25/10/2026 at 05:15 the Bonn gauge read 88 cm, the same as 24 hours earlier. Source: PEGELONLINE (WSV).

Gauge Bonn is on the Rhine at kilometre 655, on the km 624–660 stretch.

Fairway depth and rule of thumb

The GlW is 142 cm and the fairway depth maintained below it (TuGlW) is 250 cm; after deducting 30 cm of safety margin the official rule of thumb comes out at Bonn +78. In practice Bonn +78 is used here.

The fairway depth below GlW is what counts as long as no Fehltiefen are reported. Fehltiefen (shortfalls in fairway depth) are published on ELWIS Fehltiefen. The safety margin is not a statutory value and has to be taken on top of the reduced fairway depth listed there.

Forecasts and neighbouring gauges

This gauge has one forecast source: the 2-day forecast from the Hochwasserzentrale Rheinland-Pfalz (red). Upstream lies Oberwinter, downstream Köln.

Reference planes

The reference planes at the Bonn gauge, evaluated at the gauge's position.

• GlW142 cm PNP
  GlW 2022
  Source: WSV, GlW 2022

Gauge zero: 42.713 m NHN (DHHN2016)

Bonn