- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°13'39"N 4°32'42"W
- Eastings/Northings: 230196, 373086
- OS Grid: SH301730
- Mapcode Local: GBR 55.0LBB
- Mapcode Global: WH42X.44VH
Location and coordinates are for the approximate centre of Cerrig y Gwyr within this administrative area.
Geographic features and populated places may cross administrative borders.