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Mafia Island
Mafia Island Marine Park · Tanzania

Mafia Island

Tanzania’s first marine park, off the mouth of the Rufiji. Whale sharks feed here from October to March, the reefs inside Chole Bay are in unusually good condition, and there is not a single large resort on the island.

Marine parkTanzania’s first, 1995
Whale sharksOct–Mar
From Dar30 min by air
Best monthsOct–Mar · Jun–Sep
Suggested stay4–6 nights
OverviewGetting thereWhen to go What to seeWhat to doWhere to stay NearbyPracticalFAQ Enquire
The place

Mafia Island, in short.

Mafia sits off the Rufiji delta, and the river is the reason for everything. The nutrients it pushes into the sea feed a plankton bloom, and the plankton brings whale sharks — juveniles, in numbers, close inshore, from October through March.

It became Tanzania’s first marine park in 1995. Chole Bay is a large sheltered lagoon with reefs inside it that are in better condition than most of the region, protected from the open ocean and from the worst of the weather.

What Mafia does not have is development. A few small lodges, unpaved roads, one airstrip, and no resort strip of any kind. People come to dive, to snorkel with whale sharks, and to be somewhere quiet.

It is administratively part of mainland Tanzania rather than the Zanzibar archipelago, which surprises people, and it feels different from Unguja for exactly that reason.

Getting there

Where to start, and how to arrive.

01

Fly from Dar es Salaam

The standard way

About thirty minutes to Kilindoni airstrip, daily in season. The simplest arrival and the one most people use.

The trade-off

Light aircraft with strict baggage limits, usually around 15 kg in soft bags.

02

Fly from Zanzibar or the southern parks

Straight from safari

Direct light-aircraft connections from Zanzibar and, in season, from the Nyerere airstrips. Nyerere to Mafia is an obvious pairing: the same river feeds both.

The trade-off

Seasonal and not daily. These routes need planning around rather than assuming.

03

Boat from the mainland

The local route

Local boats run from Nyamisati on the mainland to Kilindoni. Cheap, slow and entirely without schedule.

The trade-off

Small open boats on open water. We do not book this for clients.

When to go

The month decides a great deal.

Oct–DecWhale sharks arrive

The aggregation builds. Warm, calm water and the first reliable sightings of the season.

Exceptional
Jan–FebPeak whale shark

The best of it — most animals, calmest sea and the clearest water of the year.

Exceptional
MarSeason ending

Whale sharks thinning out and the humidity rising. Still good in the first half.

Good
Jun–SepDry and breezy

No whale sharks, but excellent diving in Chole Bay, comfortable temperatures and very few visitors.

Good
Apr–MayLong rains

Heavy rain, rough sea, and most lodges closed. The island effectively shuts.

Low season
NovShort rains

Brief showers with whale sharks already present. Quietly one of the best-value months here.

Good
Compare with the other parks →
What to see

Where to point yourself.

Offshore

The whale sharks

Juveniles feeding at the surface off Kilindoni from October to March. You snorkel, you do not dive, and the encounter is over open water with nothing beneath you.

South-east

Chole Bay

A sheltered lagoon with reef inside it in genuinely good condition. Most of the island’s diving happens here, and it works even when the ocean outside does not.

The pass

Kinasi Pass

Where the bay meets the ocean. Current-driven diving with big fish, and the most serious site on the island.

Chole

Chole Mjini ruins

A small island in the bay with nineteenth-century ruins being swallowed by strangler figs, a boatbuilding beach and a colony of fruit bats overhead.

Juani

Turtle beaches

Green turtles nest on Juani and elsewhere in the park. Hatchling releases are run under supervision in season and are not staged for visitors.

What to do

Ways to be in it.

01

Snorkel with whale sharks

October to March, by boat from Kilindoni. Snorkelling only — no scuba, no touching, and the operators here are unusually disciplined about it.

02

Dive Chole Bay

Sheltered reef diving suitable for most levels, plus Kinasi Pass when the current is right for it.

03

Chole Mjini

A short boat across the bay to the ruins, the boatbuilders and the bats. An afternoon rather than an excursion.

04

Turtle nesting

In season, and always through the conservation programme rather than independently.

05

Kilwa Kisiwani

A longer trip to the ruined Swahili city on the mainland coast to the south — a UNESCO site, and the most impressive medieval ruin in East Africa.

Where to stay

A handful of places, all small.

Everything on Mafia is small and most of it is owner-run. There is no large resort here, and the lodges cluster around Chole Bay because that is where the diving is.

A camp terrace at dusk
“Mafia has whale sharks and no crowds, which is a combination that does not last anywhere. Come before it changes.” Gabriel Nkini · founder
Cheapest way in

Kilindoni guesthouses

A night here — a plain room in the island’s only town, five minutes from the airstrip and the whale shark boats.

Kilindoni has simple guesthouses at low prices. No reef at the door and little comfort, but the whale shark boats leave from here, which makes it a practical base in season for travellers on a budget.

Best for
Tight budgets, whale shark trips, short stays
Less good for
Divers, anyone wanting the bay or any comfort
Where
Kilindoni, near the airstrip
Most of our trips

Chole Bay lodges

A night here — a room facing a sheltered lagoon, a dive boat pulled up in front, and dhows crossing to Chole at dusk.

Almost all of Mafia’s proper accommodation sits on Chole Bay, because that is where the diving is. Small, owner-run, most with their own dive operation, and ranging from simple bandas to genuinely comfortable rooms. Numbers of guests are tiny by any standard.

Best for
Diving, whale sharks, most visits to the island
Less good for
Anyone expecting a resort or a choice of restaurants
Where
Chole Bay, in the south-east
Own rules

Small private lodges

A night here — a handful of rooms, no other guests to speak of, and a boat that goes when you want it to.

A very small number of higher-end places on the bay and on Chole island itself, some built into the ruins. Expensive, unusually characterful, and the only way to have boats and guiding entirely to yourself here.

Best for
Honeymoons, photography, privacy
Less good for
Tight budgets, travellers who want to move around
Where
Chole Bay and Chole island

Stay on Chole Bay. The diving, the boats and the whale shark trips all leave from the bay or from Kilindoni nearby. A bed elsewhere on the island means an hour in a vehicle before anything starts.

Almost everything closes in April and May. The long rains make the sea unusable and most lodges shut completely. We will not take a booking for those months.

Nearby

What it combines with.

Honest travel times, and the pairings we most often build around it.

Nyerere National Park1 hr by air · same river, obvious pairingZanzibar1 hr by air · the busier islandPemba IslandVia Dar · the other quiet oneRuaha National ParkFly via Dar · the full southern circuitTanga & PanganiUp the coast · Saadani and the river
Practical

Before you come.

Fees

Marine park and reserve fees are charged per person per day where they apply, and Jozani, Mnemba and the Mafia marine park each have their own. We quote them inside the trip price rather than leaving you to pay at a jetty.

Dress and custom

These are Muslim communities. On the beach and inside a hotel, ordinary beachwear is fine. In a village, in Stone Town and anywhere off the sand, cover shoulders and knees. During Ramadan many places do not serve food in daylight and it is courteous not to eat or drink in the street.

Health

Malaria prophylaxis is advised on the coast year-round, and mosquitoes here are active at dusk rather than at midday. A yellow fever certificate is required if you arrive from a country with risk of transmission.

Tides

The tidal range is very large, particularly on the east coast, where the sea can withdraw close to a kilometre at low water. It is not a fault in the beach; it is the beach. We will tell you which coast suits how you want to swim.

Getting about

Taxis and transfers are straightforward and arranged in advance. Public dala-dalas are cheap and slow. Renting a scooter is popular and is also where most traveller injuries here come from.

Visas

Most nationalities can obtain a Tanzanian visa on arrival or online in advance. Zanzibar is part of Tanzania, so no separate visa is needed, but you will pass through an immigration desk on arrival.

Questions

The ones we are asked most.

When exactly are the whale sharks?

October to March, with January and February the most reliable. They are wild and follow the plankton, so no month is a guarantee — but the aggregation here is unusually consistent and unusually close inshore.

Can I dive with them?

No. Snorkelling only, by regulation and by good sense. They feed at the surface, so snorkelling is also the better encounter.

Is Mafia part of Zanzibar?

No, and this catches people out. Mafia is part of mainland Tanzania, in Pwani region. There is no separate immigration and the feel of the island is different.

How is the diving compared with Zanzibar?

Better inside Chole Bay, where the reef is in noticeably healthier condition and the lagoon shelters it. There is far less choice of operator.

How many nights?

Four to six. Whale shark trips go in the morning and can be cancelled for weather, so give yourself more than one chance at them.

Is there anything to do besides the water?

Chole Mjini ruins, the boatbuilders, the turtle programme and Kilwa as a longer trip. But the water is the reason to come.

What is the accommodation like?

Small. A handful of lodges, most of them owner-run, ranging from simple to genuinely comfortable. There is no large resort on the island and no sign of one.

Can I combine it with a safari?

Very easily, and it is the pairing we build most often — Nyerere for the river and the game, then a short hop to Mafia for the reef. The Rufiji connects them literally.

Begin here

Tell us the month, and we will place you.

Where you should be depends almost entirely on when you can travel. Tell us that and we will say honestly whether Mafia Island is right for you that month — or whether somewhere else would serve you better.

Start planning → Ask on WhatsApp or call +255 762 914 714