The best time to do a Tanzania safari depends on your specific interests and what you want to experience during your trip. Tanzania has two primary seasons that affect wildlife viewing and overall travel conditions: the dry season and the wet season.

Dry Season (June to October):

This is generally considered the best time for safaris in Tanzania. The weather is dry and comfortable, with cooler temperatures in the mornings and evenings.

Wildlife is more concentrated around water sources, making animals easier to spot. This is particularly true in the later months of the dry season, when water becomes scarcer.

The Great Migration in the Serengeti typically occurs between June and July as large herds of wildebeest and other animals move in search of water and fresh grazing.

July to October is a prime time for big cat sightings, as the predators are more active during this period.

Wet Season (November to May):

The wet season is characterized by short rains from November to December and long rains from March to May.

The landscape becomes lush and green, and many animals give birth during this time due to the abundance of food and water.

Birdwatching is excellent during the wet season as migratory birds arrive in Tanzania.

Fewer tourists result in quieter parks and more intimate safari experiences. Additionally, some accommodations offer discounted rates during this time.

Note that some roads may become impassable due to heavy rains, and wildlife may be more dispersed due to the availability of water throughout the ecosystem.

Overall, the dry season is often recommended for its optimal wildlife viewing conditions and comfortable weather. However, the wet season can provide unique experiences, such as witnessing the birthing season and enjoying the lush landscapes. If you're planning to combine your safari with a beach extension in Zanzibar, the coastal areas, and especially the beaches, are more appealing during the dry season.

For the Great Migration, the timing can vary based on factors like weather patterns and animal behavior, so it's a good idea to consult with a reputable tour operator to plan your trip during the months most likely to offer the best migration sightings.