- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°56'35"N 4°33'11"W
- Eastings/Northings: 228530, 341463
- OS Grid: SH285414
- Mapcode Local: GBR 54.LQD9
- Mapcode Global: WH448.1912
Location and coordinates are for the approximate centre of Porth Dinllaen within this administrative area.
Geographic features and populated places may cross administrative borders.