When I was a boy there always seemed to be a sandbank in the middle of the beach, at low water, that you could plodge onto. In the summer it was the most popular place for kids to swim, partly because the seaward side of the sandbar made you feel as though you were nearly piers open and therefore miles from shore and partly because the land side of the bank made a lagoon where the water was 10 degrees warmer and you could restore some life to your nether regions, in those big baggy woolen bathers we all wore. Fishing consisted of casting off the bank, into open water or, better, casting up the sides of it when a bit of sea had created a hole around the bank.
Not so sure of the sandbank these days but the best hole, imho, remains on the south side of the beach, casting up the skeers of the Castle Rocks, on the ebb to the bottom of the tide.