I found this video on Howcast.com on how you can keep your hair looking awesome, even at the beach.
Before you head to the beach, wash your hair with a moisturizing shampoo, use a good conditioner, and then apply a leave-in conditioner with sunscreen.
Toss an anti-frizz hair product into your beach bag and spray it on every few hours.
Wear your hair in a beach-friendly hairstyle, like slicked back or in loose braids.
Step 4: Bring a hat
Bring a hat. A wide-brimmed straw hat tied under the chin with a scarf is always chic. Or, for a less girlish look, don a cowboy hat or a baseball cap.
Rinse your hair with fresh water as soon as you come out of the pool or ocean.
Rub a small dab of straightening cream between your hands and then wipe it on your hair if it starts to frizz.
Use a clarifying shampoo once a week and deep condition your hair once a month.
Buy a killer bathing suit. Then no one will be looking at your hair.
-Just follow these easy steps, and you'll have great looking hair even in harsh, heated weather.