The search results did not directly mention a beach named Lukrum Portside Beach near Dubrovnik. However, Lokrum Island, located off the coast of Dubrovnik, offers several attractions and beaches. Lokrum Island is a forested nature reserve with peacocks roaming freely, featuring a botanical garden, a medieval monastery, Fort Royal, and several swimming spots. It’s a popular day trip destination from Dubrovnik and is known for its tranquility and natural beauty.
Visitors often enjoy swimming in the crystal-clear waters of its saltwater lake, known as the 'Dead Sea', or exploring the island’s scenic paths. The island is accessible by a 10-minute ferry ride from Dubrovnik’s Old Town harbor.
Lokrum's beaches are generally rocky, and there's a nudist beach at the southern end, though it is not well-shaded and can be difficult to access. The island offers cafes and restaurants where visitors can enjoy local cuisine.