# Viaur river

Also known as: Le Viaur

The Viaur (also known as Le Viaur) is a European river flowing through France. As of 2026-10-15, the Viaur was flowing at about 0.149 m³/s at the Le Céor à Saint-Just-sur-Viaur - Castelpers gauge.

**Canonical name:** Viaur

**Local names / aliases:** Le Viaur

**Countries:** France

**Maximum upstream drainage area:** 1,541 km²

**Mapped river length:** 72.9 km

**Gauging stations:** 4

**Latest measured discharge:** 0.149 m³/s (Le Céor à Saint-Just-sur-Viaur - Castelpers, 2026-10-15)

## Gauging stations on the Viaur

The following 4 gauging stations report discharge for the Viaur, ordered downstream (largest catchment first). Discharge is in cubic metres per second (m³/s).

| Station | Country | Discharge (m³/s) | Historical Comparison | Observed | Measurement | Data quality | Provider | Lat, Lon | Source |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Le Céor à Saint-Just-sur-Viaur - Castelpers | France | 0.149 | — | 2026-10-15 | daily mean | Donnée brute | Hub'Eau Hydrométrie | 44.129, 2.392 | [source](https://www.hydro.eaufrance.fr/stationhydro/O542402003/series) |
| Le Viaur à Saint-Just-sur-Viaur \[Le Cambon\] | France | 1.162 | Below normal — 30% below the historic median | 2026-10-15 | daily mean | Donnée brute | Hub'Eau Hydrométrie | 44.124, 2.365 | [source](https://www.hydro.eaufrance.fr/stationhydro/O548293002/series) |
| Le Viaur à Saint-Just-sur-Viaur \[Roc Miquel\] - EDF | France | 1.042 | Much below normal — 45% below the historic median | 2026-10-15 | daily mean | Donnée brute | Hub'Eau Hydrométrie | 44.127, 2.358 | [source](https://www.hydro.eaufrance.fr/stationhydro/O548293101/series) |
| Le Viaur à Saint-Martin-Laguépie \[2\] | France | 1.193 | Much below normal — 54% below the historic median | 2026-10-15 | daily mean | Donnée brute | Hub'Eau Hydrométrie | 44.143, 1.969 | [source](https://www.hydro.eaufrance.fr/stationhydro/O557291001/series) |

## Related rivers

-   [Loire](/rivers/loire.html)
-   [Seine](/rivers/seine.html)
-   [Garonne](/rivers/garonne.html)
-   [Saône](/rivers/saone.html)
-   [Dordogne](/rivers/dordogne.html)
-   [Maine](/rivers/maine.html)
-   [Vienne](/rivers/vienne.html)
-   [Tarn](/rivers/tarn.html)
-   [Allier](/rivers/allier.html)
-   [Durance](/rivers/durance.html)
-   [Oise](/rivers/oise.html)
-   [Cher](/rivers/cher.html)

## Data, sources & timestamps

Geometry is the HydroRIVERS network (HydroSHEDS): European reaches with at least 500 km² of upstream catchment, merged into chains between confluences. Flow direction comes from the network itself; river names are the canonical English label joined from provider metadata and Natural Earth, with local-language aliases retained.

Discharge is normalised observed streamflow from official national hydrology providers, measured where a gauge sits on the river and interpolated between gauges. Pale/estimated values are derived from drainage area × the local specific discharge of nearby gauges and are never presented as measurements.

Underlying dataset built 2026-10-16T13:31:53.036165+00:00. This page generated 2026-10-16T13:35:10.972Z. Discharge values carry their own observation dates in the table above.

[Explore the Viaur on the interactive map →](/)