Zanzibar has a tropical climate and can be visited year-round. But for a sunny experience, it is best to avoid the rainy seasons from mid-March to the end of May and then the ‘short rains’ November.
If you visit Zanzibar specifically for diving, it is good to know the diving on the north coast is excellent from June to October, and the south coast is best between November and March.
For more fun in Zanzibar, we suggest you search and compare tours we have available on the Island.