When we were in Miami last time, we tried La Mer's new Moisturizing Gel Cream and loved it! It has all the same benefits as the original Creme de la Mer (hydration, repair, renewal, you know!); but in a much lighter formula. It was ultra light and left our skin smoother and firmer. The original formula would have been too rich in Miami's humidity. Actually, the original formula is just too rich at home for us.
We paired the Gel Cream with the SPF 18 Fluid Tint, which also has the beneficial seaweed extracts and antioxidants from La Mer. It too was light and provided sheer coverage (because you don't want your makeup caked on at the beach) and great sun protection.
You can find both a Saks, Neiman's, Bergdorf's, or www.lamer.com. These products come at a price, the Gel Cream retails for $220, the SPF 18 Fluid Tint for $65.