You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. The hottest months are usually March and February with an average temp of 82°F, while the coldest months are August and July with an average of 77°F. The rainiest months in Zanzibar Town are April, May, March, and November, with each month seeing an average of 8 inches of rainfall.