How to Make Beach Waves in Your Hair With a Flat Iron. Do you want sexy beach waves in your hair to kick off an adventurous summer, or just to spice up your look in the middle of winter? Whatever your reason, all you need to create beach.
Another hair trick: How to do beachy waves in less than 5 minutes: Divide your hair into two parts. Twist each section and tie with a hair tie. Run your straighter/flat iron over both of the twist a few times. Untie twists, and you're done.