Tanzania Safari in September

September is the safari month that experienced travellers tend to recommend to their friends — the one that visitors discover and then keep to themselves. The Mara River crossings continue at near-peak frequency, but the crowds have thinned from August, the prices have begun to ease, and the wildlife theatre now has a new and compelling chapter: the beginning of the return migration. The wildebeest that crossed north over the Mara River in July and August — following the rains and the fresh grass — are now beginning the journey back south, and their southbound crossings are as dramatic as their northbound crossings were.

September marks the turning point of the Great Migration's annual cycle. The herds that have spent the dry season months on the northern Serengeti and the Masai Mara are now moving south again — crossing back over the Mara River into the Serengeti, heading toward the short-grass plains of the south where the rains will soon bring fresh growth, and where the next calving season will unfold in January and February. This return journey is less famous than the northbound crossing, but for those who witness it, it is equally as powerful — and significantly less crowded to observe.

The Return Migration — Southbound Crossings Begin

The southbound crossings of September are, in the view of many experienced safari guides, more dramatic than the northbound crossings of July and August. The herds are moving with purpose — they have been on the northern plains for months, and the urge to move south appears more urgent in their behaviour. The crossings happen in large, concentrated groups as the wildebeest follow the herd instinct to move together. Your guide will be tracking both directions of movement and will position you accordingly.

By mid-to-late September, the southbound crossings typically dominate — you may see both directions happening simultaneously as some animals are still moving north while the majority are moving south. The confluence of both movements on the river creates extraordinary wildlife theatre: thousands of animals on both banks, crocodiles positioned at the crossing points, and lions watching from the adjacent banks. This is one of the most complex and compelling migration moments of the entire year.

The Weather — Peak Dry Season

September is firmly in the dry season — one of the driest months of the year. Days are predominantly sunny, rain is extremely rare, and the humidity is low. Temperature ranges are comfortable: 13-16°C at dawn, warming rapidly to 26-29°C by mid-morning. The air is at its clearest in September — visibility on the Serengeti plains can exceed 50km. This is the landscape of the classic safari photographs: golden grass stretching to the horizon, distant Acacia trees silhouetted against a clear blue sky, and wildebeest in their thousands.

Road conditions across the northern circuit are at their best in September. The grader roads of the Serengeti are smooth and fast, and the dry weather means no mud, no closures, and complete flexibility for your guide to position you where the wildlife is.

Our Recommendation

September is the safari month we recommend to travellers who have done their research. The wildlife experience is essentially identical to August — both are peak-season months with extraordinary wildlife viewing. The differences are: slightly fewer vehicles at the crossing points, slightly lower prices, and the added bonus of the return migration. For the traveller who has the flexibility to choose September over August, it is the smarter choice. The experience is as spectacular, the crowds are more manageable, and the return migration is a wildlife spectacle that very few people have witnessed.