River Taff · Afon Taf

All six gauges on the River Taff are normal and steady.

Read from 6 river-level gauges at 12:00 on 28 October 2026 GMT, and read again every fifteen minutes.

See the River Taff on the live map →

Every gauge on the River Taff, right now

Gauge km above
the mouth		 Level
now		 Against
its record		 Percentile Trend
Merthyr Tydfil No1near Williamstown 49 0.49 m Normal 80th ▬steady
Troedyrhiwnear Troed-y-rhiw 43 0.59 m Normal 80th ▬steady
Fiddlers Elbownear Abercynon 33 0.64 m Normal 80th ▬steady
Pontypriddnear Glyntaff 25 0.97 m Normal 82nd ▬steady
Upper Boatnear Hawthorn (Y Ddraenen-wen) 21 0.93 m Normal 84th ▬steady
Western Avenuenear Pontcanna 8 1.12 m Normal 78th ▬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 Taff

normalMerthyr Tydfil No1 River StationTroedyrhiw River StationFiddlers Elbow River StationPontypridd River StationUpper Boat River StationWestern Avenue River StationMerthyr Tydfil No1TroedyrhiwFiddlers ElbowPontypriddUpper BoatWestern AvenueWhere it is in Wales
The course of the River Taff, 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 Penarth, the River Taff runs 49 km. Its gauges hold between 1 and 40 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.