- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°25'36"N 5°3'46"W
- Eastings/Northings: 182540, 63047
- OS Grid: SW825630
- Mapcode Local: GBR ZD.8C6M
- Mapcode Global: FRA 078X.RBD
Location and coordinates are for the approximate centre of Porth Island within this administrative area.
Geographic features and populated places may cross administrative borders.