Swimming can be hazardous to your beauty, but it's easy enough to look good at the pool or beach with a few simple tips:
1.  Hair can be an issue for swimmers. A swim cap may solve the problem of protecting and keeping your hair dry, but unless you're in a swimmers' competition, you're going to look a little dorky.  Chlorine in swimming pools can wreck your hair (especially color) so rinse it out immediately. Swimming in salt water can actually dry your hair in a nice wave, but sun can be just as damaging to hair as skin.  Spray on a leave-in conditioner with sunscreen. Comb your hair while it's still wet so you don't wind up with a tangled mess. And please don't forget hair removal along your bikini line. No one wants to see that peeking out!
2.  Makeup. This is the time to go makeup-free or wear a just a little bit, such as waterproof mascara and a lip tint that includes SPF 15 or higher.
3.  Jewelry. Obviously, you don't need it, but maybe you're at a swim party, or on a date and want to look a bit special. Limit it to small earrings, like hoops. Too much bling on the beach just looks silly.