The best time to visit Tanzania is during the Dry season, from late June to October when wildlife viewing is generally at its best. The wildebeest migration in the Serengeti is usually during June and July and the time to see the wildebeest calving is late January to February. The southern and western circuit parks are best visited during the Dry season (June to October), unlike the more popular northern circuit parks that can be visited year-round.
Dry Season (June – October)
June and July are the best months to see the wildebeest migration. August to September is the best time to see the wildebeest river crossings in northern Serengeti. Animals are easier to spot since they concentrate around waterholes and rivers.
There are fewer mosquitoes because there is little to no rain. Skies are clear and most days are sunny
Mornings and nights get cold; it’s recommended to bring warm clothing.
Wet Season (November to May)
January-February is the time to see the calving in the southern Serengeti and an excellent time to see predator action scenery is green and beautiful; it’s low season, meaning lower rates and less crowded parksAlthough wildlife is easier to spot in the Dry season, you’ll still see plenty, especially in the northern circuit parks
Migratory birds are present, and bird watching is at its best Except for March, April, and May, rains are mostly short afternoon showers and seldom interfere with your trip. March to May is the peak of the Wet season. Wildlife viewing in Tarangire, Katavi, Selous, and Ruaha is better during the Dry season