River Usk · Afon Wysg

All nine gauges on the River Usk are normal and steady.

Read from 9 river-level gauges at 12:00 on 28 October 2026 GMT, and read again every fifteen minutes.

See the River Usk on the live map →

Every gauge on the River Usk, right now

Gauge km above
the mouth		 Level
now		 Against
its record		 Percentile Trend
Usk Reservoir No1near Cwmwysgregulated 120 0.16 m Normal 77th ▬steady
Trallongnear Sennybridge (Pontsenni) 105 0.64 m Normal 78th ▬steady
Brecon Promenadenear Uplands 93 0.77 m Normal 74th ▬steady
Llandettynear Cwmcrawnon 77 1.08 m Normal 76th ▬steady
Crickhowellnear Legar 66 0.39 m Normal 72nd ▬steady
Llanfoist Bridge Abergavennynear Grofield 53 1.21 m Normal 75th ▬steady
Chainbridgenear Kemeys Commander (Cemais Comawndwr) 38 1.18 m Normal 77th ▬steady
Trostrey Weirnear Kemeys Commander (Cemais Comawndwr) 34 0.75 m Normal 70th ▬steady
Usk Townnear Llanbadoc 30 0.72 m Normal 77th ▬steady

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 Usk

normalTrallong River StationBrecon Promenade River StationUsk Reservoir No1 River StationLlandetty River StationCrickhowell River StationLlanfoist Bridge AbergavennyChainbridge River StationTrostrey Weir River StationUsk Town River StationTrallongBrecon PromenadeUsk Reservoir No1LlandettyCrickhowellLlanfoist Bridge AbergavennyChainbridgeTrostrey WeirUsk TownWhere it is in Wales
The course of the River Usk, 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 Pillgwenlly (Pilgwenlli), the Afon Wysg runs 125 km. The lowest 17 km are tidal, where a gauge reads the tide as much as the river. The course above is drawn in two weights: the bright line is where Ordnance Survey Open Rivers calls the channel the Afon Wysg, and the faint line, about 95 km of it, is the same water running under another name, past a lake or a weir pool. Its gauges hold between 1 and 48 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.