Marcia Patmos' latest collection might make you wish it were summer all over again—even if it's unusually muggy for September and you're covered in a fine film of sweat. When else can you wear delightful new bathing suits—an M.Patmos first—or slip into a slinky knit tennis dress with a touch of stretch? Luckily, as befits a knit aficionado, Patmos included plenty of transition pieces in this season's wardrobe, so with a little layering, you can take advantage of the collection's understated charm as soon as items are in stores. Meticulously styled seaside films like The Talented Mr. Ripley and L'Avventura inspired the palette—whites, khakis, and chambray blue—and prompted Patmos to play around with the mariner stripe. Hers came color-blocked—a blue and white striped cashmere tee had a wide, lawn green cuff—and, on a pair of slouchy pants, vertical. The idea was tweaked just enough to feel fresh. In addition to the actual swimwear, some of the separates had a surf school vibe. A reversible stretch viscose tank would make a chic rash guard, and a long, space-dyed muscle tee was sporty and soft—the ultimate cover-up. Should you ever leave the beach, lean, powder blue pants with a leather waistband and a matching, stripped-down blazer provided a bit of structure. And for those days with unpredictable weather, a sleeveless trench in double-faced Italian cotton was pretty much perfect. Now all you have to do is wait.