When does Zhoushan open to sea?

Zhoushan goes to sea in April. Zhoushan is an island city, and tourism is its important economic pillar. Every April, with the gradual warming of the weather, the seawater temperature in Zhoushan begins to rise. Usually around April, Zhoushan will gradually open some island tourist attractions, such as Dongji Island and Putuo Mountain. When tourists visit Zhoushan, it is best to enjoy the beautiful scenery and various marine entertainment activities on the island at this time.