Arrow's Katie Cassidy Masters Beach Basics on Miami Vacation

Katie Cassidy hits the beach in a string bikini on Monday (December 28) in Miami, Fla.

The 29-year-old Arrow actress has beach days down to a science after spending the past week soaking up the sun while on a break from filming her CW drama in Vancouver.

Katie posted an Instagram photo showing off her beach essentials the day before, including sunglasses, lip gloss, coconut water, sheer sunscreen and a recent issue of W Magazine with cover star Cate Blanchett.

FYI: Katie is wearing a Tigerlily bikini.

25+ pictures inside of Katie Cassidy hanging out on the beach…