You’ve spent a long, sultry summer lazing on the sand, lapping up sun, and perfecting your tan. Now, the sun is about to set on this most glamorous of seasons—but you don’t have to retire your swimsuit just yet. As late summer sets in, adding a crisp note to those beloved ocean breezes, don a frothy layer of tropical-hued chiffon to ward off the chill while still looking every part the bathing beauty. This is one cover-up you won’t mind making. —L.L.