Two villages at the southern tip
Kizimkazi is at the far southern end of Unguja, inside Menai Bay, and the name covers two settlements rather than one. Kizimkazi Mkunguni, also known as Kizimkazi Mtendeni, is the fishing village and the place the boats leave from. Kizimkazi Dimbani, usually just called Dimbani, sits about five kilometres away and holds the mosque. Tour copy routinely merges the two; keeping them apart saves confusion on the ground.
Kizimkazi was once a walled town and is now known for two things that have almost nothing to do with each other: a twelfth-century inscription, and a dolphin boat industry with a documented welfare problem. Both are covered below, and the second one is not an uncomplicated attraction.
The Dimbani mosque
The Kizimkazi Dimbani mosque is one of the oldest Islamic buildings on the East African coast. A preserved Kufic inscription dates its construction to 1107 CE, and the inscription itself, along with certain coral-carved decorative elements, belongs to that period. Most of the standing structure, however, was rebuilt in the eighteenth century, so what a visitor sees is a mostly Georgian-era building around a twelfth-century core.
It is a listed National Historic Site and it is a working mosque, in current use by the community. That is the governing fact for a visit. Dress covered, shoes off, ask before entering, ask before photographing, and do not treat prayer times as an inconvenience. It is a small building and its interest is historical rather than visual; anyone expecting a monument will be underwhelmed, and anyone interested in the depth of the Swahili coast’s Islamic history will not be.
It belongs to the same Indian Ocean trading world as Stone Town and the mainland ports, covered in the Swahili cultural tours guide, and to the archaeology of the coast covered in the archaeological tours guide.
The dolphins, and why this page will not sell them to you
Almost all organised dolphin watching in Tanzania happens in the water off Kizimkazi. A fleet of small open boats leaves the village early, runs out to where the dolphins are, and follows them; on most trips, when a group is found, passengers are told to put on masks and get into the water.
That last part is why this needs more than a description. What is sold here is a swim-with activity conducted on wild, resident, unhabituated animals by a large number of boats in a small area, with no formal regulation governing how any of them behave.
The animals are a small resident community rather than a passing population. A 2016 study estimated about 136 Indo-Pacific bottlenose dolphins in Menai Bay, with a confidence interval of 124 to 172, and about 63 Indian Ocean humpback dolphins, with an interval of 57 to 95. The same individuals are encountered again and again.
The research is consistent enough to state plainly. A 2010 study in Endangered Species Research found that with tourist boats present, the dolphins were less likely to remain resting or socialising and more likely to start travelling or foraging: resting, socialising and foraging all fell and travelling rose, with energetic implications the authors set out, and they concluded that regulations on dolphin tourism were urgently needed. The 2016 study found evidence consistent with a partial distributional shift away from the main tourism area during daylight hours, which it interpreted as possible displacement from previously favoured habitat, and recorded that no formal management protects these populations from either fisheries bycatch or tourism.
None of that research reports dolphins being killed or injured by tourism. What it reports is disturbance — animals interrupted while resting and feeding, repeatedly, in the one bay they live in.
It would also be wrong to write this as a story about bad operators. A survey of Kizimkazi’s dolphin tourism covering fifty boat operators, six restaurant managers and hoteliers, fifty residents, three dive managers and two hundred and seventy tourists describes a village economy that has become substantially dependent on this one activity. Boat operators compete directly on the water for a finite number of dolphin groups, and a captain who hangs back and does not put people in the water loses out to the boat beside him that does, and gets the poor review. Individual restraint is commercially penalised and there is nothing to equalise it.
The single most effective thing a visitor can do is remove that reward: make clear before money changes hands that you are paying for a well-conducted trip rather than a guaranteed swim, and that you will not mark the trip down if the dolphins are left alone. The dolphin watching guide sets out what separates a well-run boat from a badly run one and lists the questions to ask before you pay. It is worth reading before you come here rather than after.
The alternative it would put first: dolphins are seen regularly and incidentally from boats that are not looking for them — a snorkelling trip, a dhow sail, a fishing morning, a dive boat — and an encounter with a boat that is not pursuing them is a completely different thing to watch.
The rest of the water
The Menai Bay water around Kizimkazi has reef and seagrass, and it is snorkellable and divable, though it is better known for the dolphins than for either. It is also the far south of the island, which means the sea state is dictated by the wind: calmer under the lighter north-easterly kaskazi from roughly December to March, and a genuinely uncomfortable small-boat ride under the south-easterly kusi from around June to September. The snorkelling and diving guides cover the sites, and dhow sailing and sea kayaking both run in the bay. Fumba, at the top of the same bay, is the other departure point for its islands and sandbanks.
Fishing village visits are widely advertised at Kizimkazi. No named community programme running them could be verified as currently operating, which is covered in the village tours guide. The same caution applies to cooking classes sold here as being run by a women’s cooperative: the phrase is used far more often than it is documented.
Practical notes
Boats leave early, generally soon after dawn, for two reasons — the wind gets up later, and everyone wants to be first out.
Sightings are not guaranteed and a morning can end without them. A guarantee is a statement about how hard a boat is willing to chase, not about the sea.
Dress covered in both villages and especially at the mosque. This is a conservative part of a conservative island.
Reaching the southern tip means a transfer right across the island; the guide to getting to Zanzibar and around it covers what that involves.
Reef shoes for any wading. The long rains, masika, run from about March to May and many operations close for part of them; the short rains, vuli, run from about October to December. The seasonal guide to Zanzibar and the coast covers how the two monsoon winds and the two rainy seasons shape a week here.
Common questions about Kizimkazi
Should I do a dolphin tour at Kizimkazi?
It depends almost entirely on the boat. The research on these populations documents real disturbance from tourism, there is no regulation enforcing good practice, and the conduct of the individual crew is the whole of the difference. Read the dolphin watching guide and ask its questions before you pay. If the trip turns into a chase, you are entitled to ask the captain to back off.
How old is the Kizimkazi mosque?
A preserved Kufic inscription dates its construction to 1107 CE, making it one of the oldest Islamic buildings on the East African coast. Most of the standing structure was rebuilt in the eighteenth century, so the twelfth-century material is the inscription and some carved coral decoration rather than the building as a whole.
Where exactly is the mosque?
At Kizimkazi Dimbani, about five kilometres from Kizimkazi Mkunguni, the fishing village the dolphin boats leave from. The two are routinely conflated in tour copy and are separate places.
Can I go inside the mosque?
It is a working mosque in current use and a listed National Historic Site. Dress covered, take your shoes off, ask before entering and before photographing, and accept a no. Prayer times take precedence over visitors.
Is there a better way to see dolphins on Zanzibar?
For many people, yes. Dolphins are encountered regularly and incidentally from snorkelling boats, dhows, dive boats and fishing charters, and watching animals that are not being pursued is a different and often better experience. Some crews at Kizimkazi will also take you out to watch without swimming if you ask — and the conversation itself tells you what kind of operation you are dealing with.
Does an operator calling itself “ethical” mean anything here?
Not by itself. The label is unregulated and increasingly used as marketing. The questions about approach angle, engine handling, resting groups and number of attempts are the only reliable test, and they can all be asked before you pay.
When is the sea calmest at Kizimkazi?
Under the lighter north-easterly kaskazi, roughly December to March. The south-easterly kusi from around June to September makes it a rough small-boat ride at the southern tip. The long rains from about March to May close many operations for part of the season.