I'm sorry, but it seems there might have been a misunderstanding or an error in your request. "Inpernupe" does not appear to be a recognized or existing beach in Zumaia, Spain, or anywhere else. However, Zumaia is a coastal town in the Basque Country of Spain and is known for its stunning beaches, most notably Playa de Itzurun and Playa de Santiago. Given this, I will instead create a fictional beach description inspired by the characteristics of Zumaia's beaches but keep in mind this is a fictional creation for the purpose of fulfilling the structured request provided.