The hamlet of Red Wharf Bay lies on the north side of the bay of that name, and has a promenade, (seasonal) toilets, pubs, a cafe and a small (free) car park. The Afon Nodwydd flows along the western side of the vast sandy beach, which is about 1½ miles square. The opposite (south-eastern) side is known as Pentraeth Beach and can be reached along a lane (Lon y Traeth) from Pentraeth village. This leads to a small, free parking area on firm sand. The shore here is backed by salt-marsh and low dunes.
On such a wide, sandy bay with little gradient, the incoming tide will flood the bay quickly. Make sure you're aware of the state of the tide if venturing any distance onto the sands.
Dogs are allowed at all times. The photos were taken at low tide.