Broad Haven South is not the same as Broad Haven on St Bride's Bay, it's a smaller, more secluded beach near Bosherston with rocky outcrops, calm water and frequent grey seal sightings. Most day-trippers don't find it, which is exactly why those who do stay for hours.
The lily ponds at Bosherston are a short walk away and together they make one of the best quiet days in Pembrokeshire. Come at low tide when the beach opens up fully.