One source lists many dozens of verses in the Bible and interprets each. That author concludes that God abhors nakedness when:
It is forced upon a person against their will (as when captured as a prisoner) It is associated with a sinful act (as in Pagan worship of a golden calf or engaging in an orgy or temple prostitution) It means that the individual is lacking in basic needs to the extent that they are unprotected from the harsh elements, without shelter, food, and clothing  But God also used nakedness positively, in order to communicate the message of some of the Prophets more effectively.
We have been unable to find a passage in the Bible that condemns public nudity, as in attendance at a naturist resort. There appear to be none which condemns private nudity. There seem to be a number of passages that mention nudity in the presence of others as acceptable behavior. There also appears to be many instances in the history of the Christian Church where public nudity was a normal activity. We would conclude that naturism is not disallowed by the Bible, or by church tradition and that Christians should feel free to investigate naturism freely.
Pope John Paul II, while still a Polish Cardinal wrote: "Nakedness itself is not immodest... Immodesty is present only when nakedness plays a negative role with regard to the value of the person, when its aim is to arouse concupiscence, as a result of which the person is put in the position of an object for enjoyment." 
"The Little Flowers of St. Francis", Part I, Chapter 30.