I guess this is an example of longshore drift where strong waves at an angle to the shore sweep away stones from one part of the beach and deposit them on another part.
Today in Malaga it was warm and sunny. So I went to the Malagueta beach, the local town beach. This was always a beach which has a line of stones just below the waterline. But now there is a new line of stones about 6 feet up the beach from the edge of the water. Presumably these were deposited by the large waves on 24th January. And apparently the local authorities are to import tonnes of sand to deposit on the beach in time for the main tourist season.

In the meantime, the stones were not a major problem. Especially for me - the water was freezing and I had no intention of going down for a swim. But the evidence of my eyes for theoretical Geography having a practical consequence was interesting.