- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 51°51'49"N 5°18'17"W
- Eastings/Northings: 172562, 223522
- OS Grid: SM725235
- Mapcode Local: GBR C4.SLWC
- Mapcode Global: VH0TL.0FG2
Location and coordinates are for the approximate centre of Porth Henllys within this administrative area.
Geographic features and populated places may cross administrative borders.