| Official Name: | Limpert Bay |
| Other Name: | Aberthaw Beach / Gileston Beach |
| Coordinates: | 51.387°N -3.415°W |
| Subdivision Type: | Country |
| Subdivision Name: | Wales |
| Subdivision Type1: | County borough |
| Subdivision Name1: | Vale of Glamorgan |
| Subdivision Type2: | Village |
| Subdivision Name2: | St Athan |
| Subdivision Type3: | Historic county |
| Subdivision Name3: | Glamorgan |
| Timezone1: | GMT |
| Utc Offset1: | +0 |
| Postal Code Type: | Post codes |
| Postal Code: | CF62 |
| Area Code: | 01446 |
Limpert Bay [1] is a beach on the Bristol Channel which connects to Watch House Beach to the East, the line of division is the run-off of the River Thaw and Summerhouse Bay to the West.
The beach is rock with some sand.[2] There is a guest house[3] and a free car park next to some cottage ruins.[4] An information stand at the beach gives the history of the area, provided by the Heritage Cost.[5]
The Wildlife Trust for Wales has helped record over one thousand species at this location, sixty-two of which are of principal concern to the conservation to the biodiversity of Wales.[6]
During World War II; Limpert Bay's defences formed part of the Western Command's coast "crust" defences for the Vale of Glamorgan. Defences included anti-tank cubes, pill boxes, and an anti-tank ditch.[7]
The beach is next to the decommissioned Aberthaw power stations. Two seawater intakes for the power stations are in the bay.[8] The Aberthaw Cement Works is nearby.