- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 51°40'27"N 5°7'13"W
- Eastings/Northings: 184339, 201904
- OS Grid: SM843019
- Mapcode Local: GBR G4.JF8L
- Mapcode Global: VH1S3.65BR
Location and coordinates are for the approximate centre of Castles Bay within this administrative area.
Geographic features and populated places may cross administrative borders.