Not many anchorages
on the South continental coast of Spain
, except some rivers mouths. Except that I used to stay on Genovese's Bay. The good point is that in Andaluzia lot's of Marinas
are not expensive (the ones owned by the state).
In Ibiza, Formentera and Maiorca you will have plenty of Anchorages (and very expensive marinas). Most anchorages are overcrowded at the high season. You will find less crowded anchorages in Minorca.