Diving Tanzania: The Best Dive Sites for 2025
Tanzania is often celebrated for its wildlife safaris, but the scuba diving Tanzania is spectacular, too!
Here are some of my favourite dive spots in the country.
I’ll tell you about the top dive sites, offer practical advice, and the cultural charm of Tanzania’s aquatic heritage. Read on for a scuba diving odyssey, as we uncover the top spots to discover the spectacles that lie beneath the waves.
Even if you’re not already a certified diver, there’s an underwater world in Tanzania that you need to see. If you’ve been thinking of getting certified, while you’re here is the perfect time to do it.
In fact, this 2-day PADI Scuba Diver Course will give you your certification and includes 2 open water dives.
For the rich, there is therapy. For the rest of us, there is Scuba Diving!
– Unknown
There’s no reason NOT to be diving Tanzania while you’re here! With still-heathy reefs and massive numbers of sea creatures, big and small, right there, it’s an incredible experience.
Tanzania has 1400km of coastline stretching out along the Indian Ocean and curling around the Zanzibar Archipelago.
🧳 Book your trip with the companies that I know and trust:
☑︎ Accommodations – Expedia for the best selection
☑︎ Flights – I love WayAway, and you can get 10% off with this link
☑︎ Travel Insurance – I use SafetyWing. Never skip travel insurance!
☑︎ Tours/experiences – Viator is my favourite
☑︎ Car rental – Discover Cars searches international & local rental companies to find what you need
Underwater Tanzania
The water’s always balmy, and the sand’s always soft. How can you resist? There is even great freshwater diving in Tanzania. It’s a whole world you don’t want to miss out on.
Below you’ll discover where to find the best diving around. Hang on tight!
1. Mafia Island
- Best Time to Go: all year, though April and May are rainy.
– Whale sharks and manta rays: Nov-Feb - Depth: most are <30m
- Visibility: 25-30m
This sleepy little rainforest-covered island is a part of the Mafia Archipelago. It’s the third-largest island of the Zanzibar Archipelago – the “Spice Islands”.
It sits in the Indian Ocean, opposite the river mouth of the Rufiji, and is one of the lesser-known spots for diving in Tanzania.
The amount if marine life you can spot here is spectacular, including whale sharks
As spectacular as the diving is, though, the island does not have the gorgeous beaches that so many islands do. So if you’re hoping to do some sunbathing after your dive, you might want to choose a different spot.
This area is the largest marine park in East Africa, the Rufiji Marine Reserve. Divers can attest to the success of its efforts. The reserve put a stop to the area’s dynamite fishing when it was established in 1996.
The park is now teeming with over 400 species of fish and 48 types of coral. It’s well worth your time, despite the less-than perfect beaches.
Most of the dive sites are in Chole Bay. But there are some spectacular spots outside the bay – Dinding Wall in particular.
Some of the best diving in Tanzania
Mafia Island is also an important aggregation site for whale sharks. It’s considered the most reliable place in the world to see them.
I’d recommend coming to the island sometime from November through February. This is when you have an excellent chance of seeing these enormous fish.
During the same time frame, the massive manta rays visit. These graceful gliders can reach up to 7m across. Only next to a 10m whale shark would they look anything less than gargantuan.
In addition to this megafauna, you could see grouper and tuna. Also southern stingrays, snappers, wrasse, reef sharks, and if you’re very lucky, the endangered dugong.
The area is also a breeding ground for leatherback and green turtles.
The turtles will nest all year round on Mafia island, but their main nesting season is April through May. This makes June through August hatching season.
There’s nothing like being able to watch the tiny turtles run for the surf!
Mafia Island can be reached by plane – it’s a 30-40 minute flight from Dar es Salaam. There are ferry options, but they are not recommended for safety reasons. Trust me.
2. Mnemba Atoll
- Best Time to Go: year round, though April and May are rainy
– Sperm and humpback whales September and October - Depth: 18m
- Visibility: 15m-30m
The Mnemba Atoll surrounds tiny Mnemba Island. It’s nearest to Nungwi and Matemwe Beaches on Zanzibar.
Some say that beautiful Mnemba has some of the best diving conditions in Africa. In fact, the atoll has 7 km of reef, and the calm seas allow for excellent visibility.
Its coral ecosystem, the Coral Gardens, supports around 600 species of fish, as well as turtles and dolphins.
The common dolphins around the atoll are known to be especially friendly and curious. Many stories are told of the frequent close encounters between divers and dolphins!
The largest of the nudibranchs, the Spanish Dancer, can be found on the here. The rare Dragon moray eel can be spotted, too. Keep an eye out for these two beauties.
But possibly better than any of that, September and October see large numbers of sperm whales swim through these waters.
Humpback whales will also stop here on their annual migration to mate and calve.
There is a wide selection of dive sites around the atoll. You really can’t go wrong on Mnemba, regardless of the experience you’re hoping for. Snorkelling is excellent here as well.
3. Leven Bank
- Best Time to Go: anytime, but August and September are the best times to see humpback whales.
- Depth: 14m
- Visibility: 20 m
In the waters north of Zanzibar is the aquatic playground of Leven Bank. A large plateau reaching down to 14m, it’s located in the Pemba Channel.
The steep wall of Leven Bank is good for drift diving.
If you love the thought of swimming with big game fish like barracuda and giant trevally, you’re definitely going to want to visit this dive site.
Barracuda and travelly can both reach over 153 cm (6 feet). It feels a bit surreal to be in the water with huge schools of them.
In addition to these, you can see the usual cast of characters in the way of reef fish. Keep an eye out for seahorses, octopus, and nudibranchs, to name just a few.
If you’re in the area during August or September, you may be in luck. You might hear the song of the humpback whales underwater.
This is when they visit the local tropical waters to breed and have their babies.
Leven Bank is a site most suited for more advanced divers, and advanced open-water certification may be required.
Be sure to check with the dive company you book with. The strong current sweeps through, bringing with it a supply of food for the local fish.
However, it also makes this a more challenging dive, and may not be suited to the novice diver. This depends on the day’s conditions, and where you are on the Bank.
4. Pemba Island
- Best Time to Go: October – March
- Depth: 17 m
- Visibility:30-40 m
Pemba Island is the third of the “Spice Islands”. Others, of course, are Mafia Island, and Unguja, which we call Zanzibar, along with the tiny, uninhabited Latham.
The island of Mafia is dominated by small-scale farming, especially clove trees. Fruits like mango, bananas, and breadfruit are grown here as well.
It’s also considered to be an important bird area. And of course, it has many phenomenal dive sites around it.
Although snorkelling around Pemba is incredible, too, diving offers a whole enveloping world to the diver.
The Pemba Channel, in particular, is fantastic. You can swim with large game fish, clownfish, hawksbill turtles, and countless other marine species.
There are numerous dive sites around the little island. Regardless of your experience level, you can find the perfect spot to dive.
And, if you’re getting close to your next flight, remember that the snorkelling is also top-notch.
The Swiss Reef has some favourite sites for more experienced divers. These sea mountains are a great place for drift diving.
Novices might like to check out one of the dives in the Njao Gap.
It has a variety of hard and soft coral and a massive selection of marine life. This along with the chance of seeing white tip reef sharks make this an amazing dive spot.
Pemba Island is a sleepy paradise compared to the busier main island of Zanzibar.
Fewer people and the wide expanses of empty beaches are a part of what makes this a dream destination for some. It is a bit pricier, though.
5. Lake Tanganyika
- Best Time to Go: Visibility is best November – April, May, June, and October
- Depth: 1436 m Visibility: up to 20 m
Lake Tanganyika is the longest freshwater lake in the world. It’s also the second deepest, and in those depths lies a magical world.
The lake is anywhere from 6-12 million years old. During this time, in the neighbourhood of 400 species of cichlids have developed. They range from wee 4 cm fishies to 15 cm fish
About 90% of these cichlids aren’t found anywhere else in the world. But here’s your chance. One of the unusual traits of cichlids is the fact that they’re “mouth brooders”.
This means that cichlids hold their young in their mouths to keep them safe. They’ll also hold their eggs in their mouths before they’re fertilized.
The large number of predatory fish in the lake makes this an important step in protecting the next generation of cichlids.
Seeing a female move her entire nest of young this way is a unique experience you won’t soon forget.
Along with all of these cichlids are hundreds of species of additional marine life. Fish, shrimp, and mollusks all find homes in the rocky architecture of this enormous lake.
The variety of the underwater geography in the lake creates an infinite number of nooks and crannies. These all serve as homes to the thousands of sea creatures that live in this underwater nirvana.
Don’t miss it when diving in Tanzania
Lake Tanganyika is an incredible experience for divers and snorkellers alike. Remember, though, that Lake Tanganyika is also home to hippos, crocodiles, and the Storms Water Cobra.
Diving here isn’t for the faint of heart.
It’s best to dive only when visibility is good. Most of all, listen to those around you who know the area better than you do.
If you’re diving with a group, listen to the instructions given by the dive guide. Contact the dive experts at Lakeshore Lodge for more info on diving the lake.
If you’re snorkelling from the shore near your accommodation, ask first if it’s a safe area to do so.
But most of all – do it! Caution and common sense should always be practised, but don’t let fear keep you out of the water.
Travelling Solo in Africa – Diving Safety
Do look out for your safety when you dive as a solo traveller. Regardless of your experience or certification. I never recommend diving solo. The previous page, where you found this article, has a section dedicated to diving safely as a solo traveller. Please be sure to read it through, if you haven’t already. Enjoy!
Tanzania Dive Site Map
🤿 Dive Safety When Travelling
If you have a flight out after a dive, be sure to plan ahead. There is a necessary preflight surface interval that must be adhered to.
The length of this interval varies. They are anywhere from 12 hours for a single dive to 18 hours for multiple dives or several days of diving, as stated by PADI and DAN.
The US Air Force enforces a 24-hour interval after any number of dives. And the US Navy feels that only 2 hours is necessary before a flight of any altitude.
The concern about flying too soon after diving is the risk of decompression sickness. The preflight interval ensures that all residual nitrogen in your bloodstream has had time to dissipate.
If no interval is taken, flying can have the same effect as surfacing too quickly during a dive, causing nitrogen bubbles to form.
I recommend 2 full days between your last dive and any flight. This, of course, is your decision. I encourage you to read PADI’s post-dive safety tips.
Summing It Up: Diving Tanzania in 2023
After exploring Tanzania’s scuba diving hotspots, it’s clear that this East African gem has a lot to offer below the surface.
From the coral metropolises of Mafia Island to the vibrant marine life in Zanzibar, and the hidden gems of Pemba. Tanzania’s waters promise an unforgettable adventure for everybody, beginners and skilled divers alike.
You could spend months trying to see all there is to see in Tanzanian waters. If you’re one of the lucky ones, you actually have months to do so!
If not, I hope you’ve found a little direction here to help you choose which to explore first.
Happy travels!
More Diving in Africa:
