- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°43'50"N 3°55'9"W
- Eastings/Northings: 270500, 316500
- OS Grid: SH705165
- Mapcode Local: GBR 8Z.13P2
- Mapcode Global: WH56N.RMXJ
Location and coordinates are for the approximate centre of Llyn Gwernan within this administrative area.
Geographic features and populated places may cross administrative borders.