- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 51°56'59"N 5°11'0"W
- Eastings/Northings: 181336, 232723
- OS Grid: SM813327
- Mapcode Local: GBR C9.M6ZC
- Mapcode Global: VH1QQ.38M1
Location and coordinates are for the approximate centre of Porth-gain within this administrative area.
Geographic features and populated places may cross administrative borders.