Diving in Zanzibar & Mafia Island | Whale Sharks & Coral Reefs

Overview

Zanzibar-diving

The spice of the sea.
The diving off Zanzibar, Pemba, and Mafia Island is as exotic as the islands themselves. The waters are warm, clear, and brimming with marine life. Together, they offer some of East Africa’s most colourful and diverse diving. From shallow coral gardens for beginners to deep channels, wrecks and dramatic drop-offs for pros, there’s something for everyone in Zanzibar.

Pair your Tanzanian safari with a luxury island retreat, and dive into a world of reefs, wrecks, and whale sharks.

Why Dive in Zanzibar & Mafia Island?

Protected marine parks like Mnemba Atoll and Chumbe Island
Clear, warm waters with visibility up to 30 metres
A perfect post Tanzania safari beach & dive combo
Seasonal whale shark sightings around Mafia
Wide variety of dive environments —from fringing reefs to vertical walls
Deep channels, vertiginous drop-offs, and colourful coral

Top Dive Spots in the Spice Islands

The Spice Island is the collective name for the Indian Ocean islands of Zanzibar, Pemba, and Mafia, once at the heart of the global spice trade. Famed for their fragrant cloves, cinnamon, nutmeg, and pepper, these islands blend Swahili culture with a rich maritime history—and now offer some of the most colourful and diverse diving in East Africa.

Diving off Zanzibar Island

Zanzibar is the best known island – a flat coral atoll surrounded by fringing coral reefs to the east.

Snorkellers and novice divers should also see plenty of colourful coral fish, moray eels, stingrays, and lionfish. Dolphins, turtles, manta rays and whale sharks are commonly seen.
Mnemba Atoll: a National marine reserve and top diving spot with turtles, reef sharks, and schools of tropical fish

Chumbe Island: eco-protected, with some of the most pristine shallow reefs in East Africa
Leven Bank (north of Zanzibar): open-ocean dive site for experienced divers with big currents and big fish—tuna, barracuda, kingfish, reef fish as well as moray eels

Mafia Island Diving

Mafia Island Marine Park is one of the best-preserved coral ecosystems off the coast of East Africa:

Colourful coral gardens, sponges, and reef fish
Good for all levels, including beginners
Seasonal whale shark sightings from October to March

Top Tip: Stay at Pole Pole or Kinasi Lodge for boutique luxury with direct access to Mafia's top dive sites.

Best Time to Dive in Zanzibar & Mafia

Whale sharks migrate through Zanzibar’s waters in season from August to September (and from February to March). These harmless creatures are a magnificent sight, up to 14m in length with a 1.5m wide mouth.

Diving season: Most of the year, with best conditions from October to March
Whale shark season: Peaks in November and February
Avoid April and May due to the long rains and reduced visibility

Who would love Zanzibar or Mafia Island diving?

Safari-goers looking to unwind with sea and sun
Novice divers and snorkellers wanting easy reef access
Experienced divers chasing seasonal big fish sightings
Couples or families combining beach luxury with marine adventure

See our Main Page on Luxury Diving Holidays around Africa for more destinations.

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