- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 53°24'42"N 4°17'34"W
- Eastings/Northings: 247703, 392992
- OS Grid: SH477929
- Mapcode Local: GBR HMSP.6CH
- Mapcode Global: WH422.1H2W
Location and coordinates are for the approximate centre of Porth Eilian within this administrative area.
Geographic features and populated places may cross administrative borders.