- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 53°21'55"N 4°33'33"W
- Eastings/Northings: 229804, 388444
- OS Grid: SH298884
- Mapcode Local: GBR HM3T.496
- Mapcode Global: WH423.YN1W
Location and coordinates are for the approximate centre of Porth Penrhyn within this administrative area.
Geographic features and populated places may cross administrative borders.