River Taf Fawr
The only gauge on the River Taf Fawr is normal and steady.
Read from one river-level gauge at 12:00 on 28 October 2026 GMT, and read again every fifteen minutes.
See the River Taf Fawr on the live map →Every gauge on the River Taf Fawr, right now
| Gauge | km above the mouth |
Level now |
Against its record |
Percentile | Trend |
|---|---|---|---|---|---|
| Llwynon Reservoirnear Llwyn-onnregulated | 6 | 1.05 m | Normal | 83rd | ▬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 Taf Fawr
About this river
From its highest reach down to its mouth near Gelli-deg, the Taf Fawr runs 10 km. The course above is drawn in two weights: the bright line is where Ordnance Survey Open Rivers calls the channel the Taf Fawr, and the faint line, about 7 km of it, is the same water running under another name, past a lake or a weir pool. Its gauge holds 30 years of readings, and that is what today's level is compared with.
- Llwynon Reservoir - a rain gauge near Llwyn-onn, not a river level
- Storey Arms - a rain gauge near Tai’r Bull, not a river level