It never gets really cold in Tanzania so lightweight travel clothing is the norm. On safari avoid brightly colored clothes, they may alarm the animals. Browns, beige and khaki are preferred.
Wear a hat to avoid sunstroke and don’t forget a swimsuit. Shoes should be sensible – walking through the bush is not like strolling through Hyde Park - and for climbing Kilimanjaro or Mount Meru take thermal underwear, a rain jacket, good socks and sturdy boots.
Shorts for women are acceptable - but not too short. Women should carry a wrap to cover their legs in towns or villages as revealing clothes can cause offense, especially in Zanzibar and other Muslim areas. On the beach, and within the confines of beach hotels, normal swimwear is acceptable but nudity certainly is not.