Weston Bay is a large flat area which, on spring tides, dries almost to a line between Brean Down and Birnbeck from where the bottom falls away rapidly.

This line also marks the edge of the tidal flow which is ALWAYS clockwise in the bay, which means a constant flow westward along Brean Down. This can throw up quite rough seas in this area when the wind is in the West.

This tide stream can reach 4 knots.