There is a decision almost nobody considers when booking a trip to Zanzibar, because the name is used in the singular and gives the impression there is only one place to go. In fact there are two large islands, and the difference between them is not a matter of nuance.
One concentrates practically the whole tourist industry of the archipelago. The other, 59 kilometres to the north, receives barely any visitors, and for years was known mainly for being hard to reach.
01 Why the water is different
The reason is neither tourism management nor luck: it is the sea floor. This island split from the mainland some ten million years ago along a fracture, and was left surrounded by relatively deep water. The shallow shelf that fringes it ends quickly.
That produces exactly what anyone getting in with a tank or a snorkel is after: walls falling away sheer, coral that has stayed in good condition and very abundant marine life, all of it close to shore rather than an hour's sailing away.
And there is a welcome secondary consequence: because the shallow lagoon is narrow, this coast does not suffer the spectacular low-tide emptying in the same way as the larger island's east coast. The water is closer for more hours of the day.
02 What it gives you and what it does not
03 The island behind the beach
It would be a mistake to come only for the water, because inland this island is the opposite of a beach destination. It is hillier and considerably more fertile than its neighbour, and apart from a strip of the east coast, almost all its territory is cultivated.
Small-scale farming dominates, with some large holdings of cash crops, above all the cloves that gave these islands their name. Around them people grow rice, coconut, banana, cassava and red beans.
The three important towns are Chake-Chake, which serves as the capital and sits perched on a mound overlooking a bay, Mkoani and Wete, the largest of the three. None is a tourist town, and that is a good part of their interest.
04 How to put the trip together
Rule number one is not to split yourself. This trip works with a single base and seven to ten days, not by chaining both islands into one week. If you are going to spend an extra transfer getting here, spend it once and stay.
Rule two is to book before deciding anything else. The choice of accommodation is short and leaves no slack: turning up and looking for a room, as you can on the neighbouring island, is not an option here.
And rule three is choosing the month carefully. The dry block from June to September is the most reliable, with between 30.8 and 51.9 millimetres of rain a month, but it is also the windiest, and wind stirs up the water. January and February give flatter seas in exchange for more heat: February reaches average highs of 33.2 degrees.
05 What you have to accept
The first thing is the cost in days. Getting here requires an extra connection from the larger island or from the mainland, and that connection does not always line up with the international flight. On a seven-day trip, budgeting two days to come and go is realistic.
The second is that there is no scene here. There is no restaurant street, no excursions at any hour, no options to choose between each night. You eat where you are staying or in the towns, and the day is organised around the water and little else.
And the third is an honest warning about your level in the water. A wall reef is not a lagoon: there is current, and real depth within metres of the edge. If it is your first time with a tank, it makes more sense to learn in the shallow lagoon of the neighbouring island and come here afterwards.
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