Mar 17, 2021 · Porthlisky Beach; A little further down the coast, near the southern tip of St Davids Head, lies the peaceful haven of Porthlisky Beach. More pebble than sand, this might not be the best choice of beach for avid sunbathers but is tempting spot for snorkellers, bathers and rock-poolers alike.. Overlooking the beach at Whitesands Bay in St Davids, Pembrokeshire is the site of St Patrick’s Chapel. Very little is known about the Chapel, the only historical reference being from George Owen’s Description of Pembrokeshire from 1603. Coastal erosion has been a concern at the site since the early 20th century, with regular reports of.