Mafia Island
“Tanzania's first marine park, on one of the quieter islands along this coast.”
A low-key island south of Zanzibar with Tanzania's first marine park, seasonal whale sharks, excellent diving and very limited development.
About Mafia Island.
Mafia sits roughly 120 kilometres south of Zanzibar and has almost none of its bustle. Chole Bay, on the eastern side, is enclosed by reef and forms the heart of Mafia Island Marine Park — Tanzania's first, gazetted in 1995 — with coral gardens, walls and channels that make this a highly regarded diving destination in the Indian Ocean.
The seasonal draw is whale sharks. From roughly October to March they feed in the plankton-rich water off Kilindoni on the western side, and snorkelling with them is a well-managed, boat-based activity rather than a free-for-all. Green turtles nest on Juani and Jibondo, and a local conservation programme monitors the nests.
Above water, Mafia is quiet in the most literal sense: a handful of small lodges, coconut plantations, fishing villages and the ruins of Kua on Juani Island, a Shirazi settlement abandoned in the nineteenth century. There is no international airport, no resort strip and very little nightlife. That is the point.
Come here for the sea, for silence, and for a beach extension that feels nothing like a hotel corridor. Do not come expecting Zanzibar's choice of restaurants or its ease of access.
Mafia Island, in short.
The essentials our specialists check first when shaping a private itinerary.
Good to know.
- Location
- Indian Ocean, about 120 km south of Zanzibar off the Rufiji delta.
- Getting there
- Scheduled light-aircraft flights to Kilindoni from Dar es Salaam, Zanzibar, Selous and Ruaha.
- Best time
- October to March for whale sharks and clarity; avoid April and May.
- Marine park fee
- A daily conservation fee applies within the marine park and is normally included in lodge rates.
- Minimum stay
- Four nights — the flight schedule and the diving both reward a longer stay.
- Whale sharks
- Snorkelling only, from boats, under managed conditions. Sightings are seasonal and never guaranteed.
- Facilities
- Very limited — few lodges, minimal shopping, no nightlife, patchy connectivity.
- Combines with
- Ruaha or Nyerere for a southern-circuit safari-and-sea itinerary.
Why visit Mafia Island?
Whale shark snorkelling
Boat-based encounters off Kilindoni, typically October to March.
Chole Bay diving
Coral gardens, walls and channels inside a protected reef system.
Mafia Island Marine Park
Tanzania's first marine protected area, gazetted in 1995.
Turtle nesting
Green turtles nesting on Juani and Jibondo, with local nest monitoring.
Kua ruins
An abandoned Shirazi settlement on Juani Island, reached by boat.
Genuine quiet
A handful of small lodges and no resort development at all.
Species you may encounter.
Wildlife commonly associated with the region. Sightings are always wild and never guaranteed.
Whale shark
Seasonal aggregation off the west coast, typically October to March.
Green turtle
Nesting on Juani and Jibondo, and seen regularly on dives.
Reef fish
Exceptional density and diversity inside Chole Bay.
Humpback whale
Passing offshore roughly July to September.
Bottlenose and spinner dolphin
Common in the channels year-round.
Coconut crab
Present on the outer islands — the world's largest terrestrial crustacean.
Pemba flying fox and shorebirds
Fruit bats plus good migratory wader numbers on the flats.
Experiences in Mafia Island.
The right time for Mafia Island.
Whale sharks: October – March · Best diving: October – March · Closed or wet: April – May
Hot and calm; peak whale shark and diving season.
Best visibility of the year with continued whale shark activity.
Still warm and clear, with humidity building.
Long rains; most lodges close.
Wettest month; very limited operations.
Reopening; drier, breezy and good value.
Cooler and breezy; humpback whales passing offshore.
Dry, breezy and comfortable; good diving inside the bay.
Warming with calming seas and improving visibility.
Whale sharks return and the sea turns calm and clear.
Short rains in bursts; excellent whale shark encounters.
Hot, clear and calm; festive weeks book out early.
- Altitude
- Sea level
- Average temperature
- 24 – 32°C; humid, sea around 26 – 29°C
- Dry season
- June – October and January – February
- Rainy season
- March – May and November
Mafia Island, in pictures.
Combine Mafia Island with…
Arusha
The Gateway to Tanzania's Legendary Northern Safari Circuit
Arusha is Tanzania's premier safari gateway, offering easy access to world-famous national parks, Mount Kilimanjaro, rich cultural experiences, luxury lodges and authentic East African hospitality.
Arusha National Park
The most underrated hour from Kilimanjaro Airport.
A compact, gloriously varied park at the foot of Mount Meru — montane forest, crater grasslands and the alkaline Momella Lakes, with walking safaris, canoeing and colobus monkeys just forty minutes from Arusha.
Serengeti National Park
The endless plains.
Fourteen thousand square kilometres of grassland, kopjes and riverine forest carrying the largest land migration on earth — and, outside the migration, the densest population of big cats in Africa.
Ruaha National Park
The wildest big park in East Africa.
One of Africa's largest national parks — a remote southern wilderness of baobabs, sand rivers and rocky escarpments, with exceptional lion densities, huge elephant herds and fly-in camps that see a fraction of the northern circuit's visitors.
Planning your visit.
Practical guidance from our on-the-ground team, tailored to this destination.
Health
Coastal malaria risk. Seek current medical advice regarding malaria prevention for this region, and bring any specialist medication with you.
Frequently asked.
When can I snorkel with whale sharks at Mafia?
Typically October to March, when they feed in the plankton-rich water off Kilindoni. Encounters are boat-based, snorkel only, and never guaranteed.
Is Mafia better than Zanzibar?
Mafia suits travellers prioritising diving, marine life and quiet, while Zanzibar offers a much broader choice of hotels, restaurants and flights. They serve different styles of beach trip.
When is Mafia closed?
Most lodges close during the long rains in April and May.
Is it good for non-divers?
Snorkelling in Chole Bay is excellent, and there are dhow trips, sandbank picnics and village and ruin visits. But the island's value is overwhelmingly in the water.
How do I get there?
Light-aircraft flights to Kilindoni from Dar es Salaam, Zanzibar or the southern safari parks.
Related reading.
Guides that pair well with a journey to this destination.
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