Sperry Figawi2 2-Strap
($70; sperry topsider.com) The sole works like a treaded tire: Water passes through the deep, curvy ridges, which increases grip on slippery decks.
Keen Hood River II
($85; keenfootwear.com) The toe bumper and mesh webbing protect your feet but allow water to drain quickly. A grippy carbon-rubber sole boosts traction.
Bite Xtension 3
($80; biteshoes.com) A thick midsole absorbs impact so you can run trails shock-free. The sandal's leather and mesh upper keeps the air flowing on hot days.