River Dee · Afon Dyfrdwy
All five gauges on the River Dee are normal and steady.
Read from 5 river-level gauges at 12:00 on 28 October 2026 GMT, and read again every fifteen minutes.
See the River Dee on the live map →Every gauge on the River Dee, right now
| Gauge | km above the mouth |
Level now |
Against its record |
Percentile | Trend |
|---|---|---|---|---|---|
| Manley Hallnear Erbistock (Erbistog) | 95 | 1.02 m | Normal | 82nd | ▬steady |
| Ironbridgenear Aldford | 48 | 4.99 m | Normal | 77th | ▬steady |
| Corwennear Ty’n-y-cefn | - | 0.92 m | Normal | 85th | ▬steady |
| New Innnear Llanuwchllyn | - | 1.08 m | Normal | 94th | ▬steady |
| Bala GSnear Llanforregulated | - | 0.81 m | Normal | 88th | ▬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. A hyphen in the first column means the reach that gauge stands on has no path to the sea in Ordnance Survey Open Rivers - a lake, a culverted stretch or the edge of the mapped area can interrupt a channel - so there is no distance down the river to measure.
The course of the River Dee
About this river
From its highest reach down to its mouth near Talacre, the River Dee runs 108 km. The lowest 50 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 River Dee, and the faint line, about 123 km of it, is the same water running under another name, past a lake or a weir pool. Its gauges hold between 29 and 53 years of readings, and that is what today's levels are compared with.
- Bangor On Dee - published as a height above sea level rather than as a river level, so it is not comparable with the rest
- Farndon - published as a height above sea level rather than as a river level, so it is not comparable with the rest
- Dee Bridge - a reservoir. Its gauge measures how far the water has drawn down from a fixed mark, which is not a river level, so it is not in the table above
- Pant Gwyn - a rain gauge near Rhosdylluan, not a river level