Tanzania is situated fairly close to the equator and the seasons can be divided loosely into rainy and dry seasons. Most visitors choose to come during the dry seasons, as there is very little chance of rain and the wildlife viewing is better.
Long rainy season: March, April, May.
Short rainy season: end of October to middle of December
Whilst you may experience rain, the benefits of coming during rainy season are that the countryside is green, lush and spectacularly beautiful. Crops are growing and the animals have good sources of food and water. You will see plenty of wildlife during the rainy seasons, but less than in dry seasons.
The National Parks have the most visitors during July & August and middle of December to early January. If you want the chance to see the Migration crossing the Mara River in the Northern Serengeti, you should come in August/September.
