- Category: Water Feature
- Type: Estuary
- Latitude/Longitude: 50°30'31"N 5°2'6"W
- Eastings/Northings: 184889, 72053
- OS Grid: SW848720
- Mapcode Local: GBR ZG.R0JP
- Mapcode Global: FRA 07BQ.B5V
Location and coordinates are for the approximate centre of Porthcothan Bay within this administrative area.
Geographic features and populated places may cross administrative borders.