It is important to know the seasonal weather trends and the animal dispersal pattern when planning a visit to this area.
Unlike other areas of Tanzania, in the Tarangire the most rainy months of the year are January, February and March, when heavy downpours are frequent, alternating with a generally bright sky and sunshine hours at high levels.
This is the time of the year when wildebeest, zebra and most of antelope and gazelle calves should be born.
Sightings in the Tarangire are more difficult and it is better to move to the Manyara Lake National Park.
While the buffalos, antelopes and gazelles are in the game controlled areas and in the Masai Steppes to the South and South-East; many cats, such as lions and cheetahs, have moved into these areas in pursuit of their prey.
Resident game in the Tarangire National Park includes a small number of elephants, waterbucks, impalas, giraffes and kudus; it is also difficult to spot them because they are not forced to go down to the river to find water, and vegetation is abundant as well.
In June and July rainfalls stop and the dry season tends to start by the end of May, with the sky often hazy and cloudy.
These are the best months to visit the Tarangire National Park because all the animals have returned, the vegetation is rare and all seasonal sources of water have dried up, and the animals are forced to gather along the banks of the Tarangire river to get the water they need.
The animals are ready to migrate, but their movements depend on rainfall frequency and rate; the earlier the rain starts and the heavier they are, the earlier the animals move into other areas of the Tarangire ecosystem, but if the rain comes late or is very light, the animals are reluctant to abandon the river.