- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°49'29"N 4°44'18"W
- Eastings/Northings: 215585, 328779
- OS Grid: SH155287
- Mapcode Local: GBR GPP7.670
- Mapcode Global: WH33M.58T6
Location and coordinates are for the approximate centre of Porthorion within this administrative area.
Geographic features and populated places may cross administrative borders.