Yes, most travelers require a visa to enter Tanzania, including Zanzibar. You can apply for a visa upon arrival at the airport or in advance through the Tanzanian embassy or online.

Zanzibar is generally safe for tourists. However, as with any destination, it's important to take common precautions. Avoid walking alone late at night in isolated areas, keep your belongings secure, and follow the guidance of local authorities and tour guides.

Light, breathable clothing is ideal for the warm, tropical climate of Zanzibar. On beaches and resorts, swimwear is acceptable, but when visiting towns like Stone Town or villages, it's respectful to dress modestly. Women should cover their shoulders and knees in public places out of respect for the local culture.