I've been to a number of nude beaches over the years:
1. Gunnison Beach, Sandy Hook, NJ - in my opinion, the best for the SHEER VARIETY of women on the beach. Every nationality and size that you can imagine. White, black, Hispanic, Indian, Japanese, Chinese, Russian, German, and on and on. And thousands on the beach on a nice summer weekend.
Amazing beach for people watching. That being said, the water is not that great.
2. Orient Beach, St. Martin - gorgeous beach, beautiful azure blue water. Great location for taking nude shots either very early or very late in the day when crowds die down. Water is very comfortable temperature wise, but somewhat choppy from what I remember.
3. Little Makena Beach, Maui - gorgeous hidden cove of a beach. Very young and attractive beachgoers. Saw some amazing women when we were there. And one of them was my wife
Downside are the gawkers in the trees behind the beach. They don't harass or call out, but it's weird to have them behind and ogling the whole time.