[header] How to pack for swimming (girls ) [title] Get a reasonably sized (waterproof suggested) bag that can hold all your items. [title] Pick out your bathing suit and the clothes you'll want to wear afterwards. [step] You can also have your bathing suit on under your clothes to save time when you're in a rush. 
But, if you have to pick your suit up from somewhere, it's fine to put it on when you arrive at your destination. You can change in the changing rooms or the bathrooms.