Mafia is celebrated as an excellent world-class diving terminus with some of the richest reefs in the world, The park covers the Southern part of Mafia Island and includes the inhabited islands of Chole, Juani Jibondo and Bwejuu and several uninhabited islets and the associated waters.
Lies around 120 km south of Dar es Salaam and 20 km offshore from the eastern extent of the Rufiji one of the largest delta systems in Africa. The main island of Mafia is about 48 km long and 17 km wide at its widest point.
The area hosts an outstanding mosaic of tropical marine habitats including coral reefs, sea grass beds, mangroves and inter-tidal flats. In addition, a remnant block of threatened lowland coastal forest survives along the eastern seaboard of the island, roughly half of it within the marine park boundary. Two species of sea turtle use Mafia’s beaches as nesting grounds and the area has been recognized internationally as a critical site for biodiversity. Several sites of historic ruins lie within the marine park area, some dating back to the C 13th. Mafia Island’s separation from the mainland and its freedom from industrial development have ensured that its surrounding waters are some of the least contaminated in Tanzania. The marine park area has national importance as one of the few remaining reef complexes within Tanzania’s coastal waters in relatively intact condition.
Depending on the season, you can swim with whale sharks, spot humpback whales and even spot Turtles nesting. This island is the true definition of relaxation and while there are mostly luxury lodges on the island, it is definitely doable for budget backpackers.
The biggest draw for tourists is the Whale Sharks. You can swim with them from October-February. You can also do Humpback whale tours from August – to September and see turtle hatchlings from June -August.
I’d suggest at least a week on the island to enjoy the activities while also having a couple of days to rest.