The greatest Snorkeling spots at Mnemba Island Snorkeling at Mnemba Atoll. It is suggested to have Mnemba Island snorkeling when the tide starts to come in instead of when it’s outgoing to the sea because it brings sediment and lowers the visibility. Some considered, Mnemba Island Snorkeling, and Mnemba diving as the best of Snorkeling spots in Zanzibar.One can do,Mnemba Island Snorkeling, and Mnemba Island Diving at any day and time but the most best months to be is between September to march but anytime is good time for Mnemba Snorkeling in Zanzibar