You can stroll along Marbella Marina for relaxing water views when you're in Marbella City Centre. Hotels.com travelers also say the area is full of friendly people and has lots of nice beaches. If you carry on walking you'll get to Venus Beach, Fontanilla Beach, and Bajadilla Beach for some more water views.
Whether you want to collect beach glass or watch the sunset, Venus Beach is a spot you might want to check out when visiting central Marbella. If you want to continue walking by the waves, head to Bajadilla Beach and Playa del Faro, both within a short walk.