When well-dressed first mates dock at Sunset Harbor, they make a beeline for Beach boutique across the street. Owner Patricia Costa, who was En Avance’s inhouse jeweler and store director for years, focuses on resortwear that breezily transitions from sunning to supping. Her favorite spring picks are Greek goddess gowns in handbeaded silk chiffon by Aussie newcomer Anu, and rompers to caftans in critter-crazy prints by London’s Key Leaf. For yacht-ready wardrobes, she also stocks layered pearl jewelry, Level 99 jeans and We Are Owls scarves. The perfect swimsuit is in order, too, especially when it’s Lilivon’s mermaid style embroidered with fish scales.