Puerto Banus - the place to be seen. good sheltered beach east of the marina. Or you can treat yourself to a day at the Marbella Beach Club - you need to arrive early in peak season.
Playa Cristo, Estepona - lovely sandy cove with showers, couple of beach bars and within a short walk of the marina and the town.
La Rada, Estepona - 2.6 km of beautiful sandy beach backed by a traditional promenade and plenty of shops. There is also a good childrens playground here.
Playa Nueva Andalucia, west of Puerto Banus - trendy beach clubs,
Mistral Beach, between Puerto Banus and San Pedro - panoramic
views and fabulous casual beach restaurant.
San Pedro - long promenade ideal for walking, jogging, rollerblading
etc. Easy parking and plenty of bars and restaurants. At the east end
there are 2 trendy beach clubs - Victors and Babaloo Beach