Sea swimming definitely appeals more than swimming pool swimming. On a hot day, with a non-scary sea (i.e. gentle sands, no scary breakers) I do sometimes feel the call of the water. Swimming pools I just find quite hideous in every way.

Although hopefully the "living on an island" thing won't become relevant, and I won't end up having to swim to the mainland as the only way to escape some hideous island-based apocalypse.