At Borth - assuming the weed's not too bad - forget it by day due to grockles swimming and frightening the weevers!
Best bet is over low water if it falls a bit before sun-up. Get there a couple of hours before. Chance of a small-eyed ray to sandeel. Dogs also likely and bass too; flounders close-in to worms and dabs at ultra-distance, but small this time of year. Decent turbot will be unlikely to show for a few more weeks, so concentrate on rays & bass!