- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°50'45"N 4°43'34"W
- Eastings/Northings: 216506, 331077
- OS Grid: SH165310
- Mapcode Local: GBR GPP5.KXB
- Mapcode Global: WH33F.CQPM
Location and coordinates are for the approximate centre of Porth Llwynog within this administrative area.
Geographic features and populated places may cross administrative borders.