The Products:
1.25-inch Curling Iron
Dry Shampoo
Beach Spray

The How-To: "Naturally straight hair needs a bit of extra love when it comes to getting beach waves," says Townsend. "Instead of the double barrel iron, I use my 1.25-inch GHD curling iron." Section you hair into small/medium sections (depending on the density of your hair), and spray it with dry shampoo. "Next, wrap your hair around the iron starting from the top and going down," he explains. "Hold your section in the iron for a few seconds before releasing it." If your hair doesn't hold a curl, leave it as is. Otherwise, use your fingers to pull the curl straight for a hot second to get wavy texture. Finish it off with a beach wave spray for additional texture.

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The Products:
Flat Iron
Texture Spray

The How-To: Creating an "S" wave with your flat iron is easier than it sounds. "Manipulate your hair (section by section) into the shape of an "S" and tap the flat iron over it as you go," says Townsend. "If it sounds complicated, think of it like this: Going out, tap with iron, Going in, tap with iron, and so forth." This will give you that messy texture. "The more perfectly imperfect it is, the better and sexier it will look." Add hold and texture with a misting of texture spray.

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The Products:
Old T-Shirt
Sea Salt Spray

The How-To: Begin by misting a sea salt spray sparingly all over damp hair. Russo's favorite is Bumble and Bumble Surf Spray, $27. Next, take two-inch sections of hair and, with a t-shirt, scrunch each section from the ends to the scalp. Russo uses a t-shirt rather than his hands to help avoid frizz and friction. Let hair air dry, or for more volume, use a finger-like diffuser on the end of your blow dryer. Enjoy your Ariel-like hair.

The Products:
Flat Iron

The How-To: "One of my favorite techniques is to braid your dry hair and hit the flat iron over it a few times," says Townsend. "If you let the hair cool before releasing the plait, you will have seriously sexy beach bends." Image Source

The Products:
Beachwaver Curling Iron

The How-To: For beachy waves that look a little more "done," try celebrity stylist Sarah Potempa's cult-favorite Beachwaver. Start with unwashed hair. Using the Beachwaver S.75, $129, curl small sections of your hair away from your face to keep the pattern uniform. Once your curls have cooled, use your fingers to break them up. This gives them definition and texture without looking disheveled. Bonus: Wake up the next morning and go. Second-day Beachwaver hair is a little bit looser and more disheveled -- like you just got back from the beach.

Image via Sarah Potempa