River Rhymney · Afon Rhymni
All four gauges on the River Rhymney are normal.
Read from 4 river-level gauges at 12:00 on 28 October 2026 GMT, and read again every fifteen minutes.
See the River Rhymney on the live map →Every gauge on the River Rhymney, right now
| Gauge | km above the mouth |
Level now |
Against its record |
Percentile | Trend |
|---|---|---|---|---|---|
| New Tredegarnear Phillipstown | 47 | 0.39 m | Normal | 89th | ▬steady |
| Bargoednear Gilfach | 41 | 0.39 m | Normal | 78th | ▬steady |
| Waterloo Bridge Machennear Trethomas | 24 | 0.45 m | Normal | 72nd | ▼falling |
| Llanedeyrnnear Llanedeyrn Village (Pentref Llanedeyrn) | 10 | 0.60 m | Normal | 79th | ▬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 Rhymney
About this river
From its highest reach down to its mouth near Pengam Moors, the Rhymney River runs 55 km. The lowest 7 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 Rhymney River, and the faint line, about 21 km of it, is the same water running under another name, past a lake or a weir pool. Its gauges hold between 16 and 37 years of readings, and that is what today's levels are compared with.
- Rhymney Reservoir - a rain gauge near Llechryd, not a river level
- Ty Fry - a rain gauge near Bargoed (Bargod), not a river level
- Machen Waterloo - a rain gauge near Trethomas, not a river level