The Nude Beach is located at Lillö at the island Gränsö west of Västervik. We hope we will get more detailed info within short.
Drive past Gränsö Palace to a signpost that reads "Lillön". Turn towards Lillön and park at the car park. Walk past a road block through the woods until you arrive at the beach (rock beach). 

It may be a little hard to find the nude beach but you may ask people at the beach unless they are nude, because then you have arrived!