June to October – Dry season (the classic choice) This is peak safari season across Tanzania. Grass is short, vegetation thins out, and animals cluster around rivers and waterholes, making game viewing easy in parks like Tarangire, Ngorongoro Crater, and the central Serengeti. It also lines up with the Mara River crossings (July–September) — the most dramatic part of the wildebeest migration. Skies are clear and rain is rare, which is why this stretch commands the highest prices and the biggest crowds.
January to March – Calving season If predator action and newborn wildlife are the draw, this is arguably the best window. The southern Serengeti and Ndutu area fill with wildebeest giving birth — around 500,000 calves in a few weeks — which also brings intense predator activity as lion, cheetah, and hyena take advantage. Weather is warm and mostly dry, with short rain showers. Fewer tourists than the June–October rush, and lodges are often more affordable.
April to May – Long rains (low season) Heavy rains make some roads difficult and a portion of camps close for the season. Wildlife viewing is still possible, especially in Ngorongoro and Tarangire, but it’s harder work. The upside: dramatically lower prices, lush green scenery, and near-empty parks — good if budget or solitude matters more to you than guaranteed sightings.
November to December – Short rains A shoulder season — brief afternoon showers, green landscapes, migrating herds moving back south toward Ndutu, and noticeably fewer visitors than peak season. A nice middle ground if you want decent weather without the June–October price tag.
Quick decision guide:
- Want the Mara River crossings → July–September
- Want newborn wildlife and predator drama → January–March
- Want to combine safari with Zanzibar beach time → June–October or December–February (driest, calmest seas)
- Want lower cost and fewer crowds → April–May or November