- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°52'31"N 4°41'17"W
- Eastings/Northings: 219195, 334262
- OS Grid: SH191342
- Mapcode Local: GBR GPS3.5BN
- Mapcode Global: WH337.YZRJ
Location and coordinates are for the approximate centre of Porth Lydan within this administrative area.
Geographic features and populated places may cross administrative borders.