Mnemba Atoll, a ring of coral reef around a small private island off the north-east coast of Zanzibar, is the island’s most famous snorkelling site. The water is often gin-clear, the reef drops in sandy steps from the shallows, and you can expect clouds of reef fish, starfish, the odd turtle and, with luck, pods of dolphins moving through the channel. The island itself is private and closed to day visitors, so boats anchor over the reef inside the protected marine conservation area and you swim from the boat. This page links to a full-day trip on Tiqets that collects you from your hotel, drives north to Nungwi and takes you out by boat to Mnemba for a dolphin watch and swim, followed by snorkelling on the reef. Back on shore there is a plate of tropical fruit and a seafood lunch near the beach, before the drive back. It is the easiest way for anyone staying in Stone Town to see Zanzibar’s north coast and its reef in one day.
How it works: the tour is run by Funbeach Zanzibar Tours and starts at 9:00 with hotel pickup, which you choose at checkout. It lasts about eight hours and includes transport, the boat and boatman, conservation fees, a local guide, tropical fruit such as watermelon, mango, pineapple and passion fruit, and a seafood lunch at a restaurant near Blue Moon. Groups are small, and free cancellation runs until 24 hours before.
On the water: the boat leaves from the beach at Nungwi and heads for the atoll. Dolphins are wild and not guaranteed. When they appear, the guide will ask you to slip quietly into the water rather than jump or chase them, which gives everyone a better encounter. Snorkelling gear is provided on most trips, but bring your own mask if you have one that fits well.
Making the most of it: the sea is usually calmest in the morning and in the drier months. Use reef-safe sunscreen and a rash vest, as the sun on the water is fierce, and take seasickness tablets if you are prone to it. Staying in Nungwi or Kendwa shortens the drive considerably.
What to expect
The experience
Hotel pickup, a drive to Nungwi, a boat to Mnemba Atoll for dolphins and snorkelling, then fruit and a seafood lunch ashore.
Best time
Calm, dry months such as December to February and June to October give the clearest water and smoothest crossings.
How long
About eight hours door to door, with roughly half of it on or in the water.
Tips
Bring reef-safe sunscreen, a rash vest, a towel and your own mask if you have one, and never chase or touch the dolphins.
Quick picks
- Best for
- Confident swimmers who want Zanzibar’s best reef and a chance of dolphins in one easy day.
- Families
- Good for children who swim well and are happy on small boats; younger ones can snorkel with a float.
- Couples
- A long, sunny day at sea with clear water and lunch by the beach is a classic Zanzibar memory.
- Pair with
- A sunset dhow sail off Kendwa the same evening if you stay on the north coast.
- Time needed
- A full day.
Good questions
Can you land on Mnemba Island?+
No, Mnemba Island is private and closed to day visitors. Boats anchor on the reef around it and you snorkel from the boat.
Are dolphins guaranteed?+
No, the dolphins are wild and sightings depend on the day. The snorkelling on the atoll is worthwhile even without them.
What is included in the Mnemba trip?+
Hotel pickup and drop-off, the boat and boatman, conservation fees, a guide, tropical fruit and a seafood lunch are included. Tips and drinks beyond those served are extra.
Do I need to be a strong swimmer?+
You should be comfortable swimming in open water, as you snorkel from the boat. Life jackets or floats help nervous swimmers.
How do I behave around the dolphins?+
Slip quietly into the water and let the dolphins come to you, without chasing or touching them. Calm swimmers get the best encounters.
