Nestling within Tanzania’s Shungi Mbili Island Marine Reserve, Thanda Island is 8ha in size, 1,1km in circumference and 350m wide. Thanda Island is 16 nautical miles or 30km east of the mainland of Tanzania, opposite the Rufiji River Delta. It is accessible by boat or helicopter.
The Island is in the East African Time Zone, which is one to two hours ahead of the Central European Time Zone. It is 7 degrees south of the equator.
Thanda Island is located between the mainland of Tanzania and Mafia Island. It is surrounded by coral reefs, which protect Thanda Island from massive waves and heavy seas. This adds to the Island's suitability for children. (The name 'Mafia’ is derived from the Arabic morfiyeh, meaning group or archipelago, and from the Swahili mahali pa afya, meaning a healthy dwelling-place.)