River Monnow · Afon Mynwy

All three gauges on the River Monnow are normal.

Read from 3 river-level gauges at 12:00 on 28 October 2026 GMT, and read again every fifteen minutes.

See the River Monnow on the live map →

Every gauge on the River Monnow, right now

Gauge km above
the mouth		 Level
now		 Against
its record		 Percentile Trend
Grosmont Rhosllwynnear Kentchurch 27 0.63 m Normal 52nd ▬steady
Skenfrithnear Garway 17 0.27 m Normal 32nd ▬steady
Monnow Gatenear Chippenham 1 1.94 m Normal 29th ▼falling

The percentile is where a gauge's latest reading sits in its own record of readings, not how full the channel is. A river sits low most of the time, so a high percentile takes surprisingly little water: at Beddgelert on the Glaslyn, with thirty-six years of record, the ninety-fourth percentile is about 1.05 m - 1.38 m below the highest level ever recorded there.

The course of the River Monnow

normalGrosmont Rhosllwyn River StationSkenfrith River StationMonnow Gate River StationGrosmont RhosllwynSkenfrithMonnow GateWhere it is in Wales
The course of the River Monnow, drawn from Ordnance Survey Open Rivers. Each gauge is coloured by where its level sits today. A grey dot is a gauge we do not rank, and a hollow ring is one that is not reporting. North is up.

About this river

From its highest reach down to its mouth near Wyesham, the Afon Mynwy runs 60 km. Its gauges hold between 11 and 18 years of readings, and that is what today's levels are compared with.

This is not a flood-warning service. For flood warnings in Wales go to Natural Resources Wales; in England, the Environment Agency. In an emergency call 999. The map cannot see the sea, surface water, drains, or any one address.