River Llynfi · Afon Llynfi
All four gauges on the River Llynfi are normal and steady.
Read from 4 river-level gauges at 12:00 on 28 October 2026 GMT, and read again every fifteen minutes.
See the River Llynfi on the live map →Every gauge on the River Llynfi, right now
| Gauge | km above the mouth |
Level now |
Against its record |
Percentile | Trend |
|---|---|---|---|---|---|
| Three Cocksnear Pontithel | 163 | 0.30 m | Normal | 33rd | ▬steady |
| Maestegnear Garth | 11 | 0.33 m | Normal | 67th | ▬steady |
| Coytrahennear Ton-du | 2 | 0.52 m | Normal | 87th | ▬steady |
| Aberkenfignear Ton-du | 1 | 0.78 m | Normal | 87th | ▬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 Llynfi
About this river
From its highest reach down to its mouth near Aberkenfig (Abercynffig), the Afon Llynfi runs 180 km. The course above is drawn in two weights: the bright line is where Ordnance Survey Open Rivers calls the channel the Afon Llynfi, and the faint line, about 18 km of it, is the same water running under another name, past a lake or a weir pool. Its gauges hold between 17 and 43 years of readings, and that is what today's levels are compared with.
- Talgarth - a rain gauge near Bronllys, not a river level
- Croeserw - a rain gauge near Brynheulog, not a river level
- Llety Brongu - a rain gauge near Lletty Brongu, not a river level