River Gronw · Afon Gronw
The only gauge on the River Gronw 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 Gronw on the live map →Every gauge on the River Gronw, right now
| Gauge | km above the mouth |
Level now |
Against its record |
Percentile | Trend |
|---|---|---|---|---|---|
| Whitlandnear Trevaughan | 1 | 0.59 m | Normal | 80th | ▬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 Gronw
About this river
From its highest reach down to its mouth near Trevaughan, the Afon Gronw runs 12 km. Its gauge holds 23 years of readings, and that is what today's level is 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.