A lightweight linen beach cover up dress is the practical choice for days when you want coverage without heat. Linen breathes and moves with the breeze. The fabric wrinkles but that is part of the look. The dress should be loose enough to wear over a swimsuit without clinging. Knee length or longer works best for a beach cover up. Neutral colors and natural tones keep the focus on the fabric texture not a busy print. Linen dries quickly if you get splashed. Pair with simple shoes or go barefoot. These dresses work because they are comfortable enough for beach days and put together enough to wear to a casual lunch after swimming.