The Great Migration Month by Month: When Exactly to Be Where

Let me tell you something most safari websites will not. The Great Migration is not a schedule. You cannot open a calendar, point to a date, and say "the herds will be here." It does not work like that. The migration follows the rain. And the rain follows its own rules. So the single most important thing I can give you in this guide is honesty about what actually happens on the ground, month by month, based on years of watching these animals move across this incredible landscape.

Too many travellers arrive in the Serengeti expecting a spectacle on demand. The ones who leave transformed are the ones who understood the rhythm before they booked. That is what this guide is for.

January to February: The Calving Season

This is my personal favourite time in the Serengeti and most people have never even heard of it. The herds gather on the short grass plains of the southern Serengeti and Ndutu area. Around 8,000 calves are born every single day during a two to three week window, usually peaking in early February. You read that right. Eight thousand new lives every day.

The predator action is constant. Lions, cheetahs, hyenas, and jackals all know what this season means. They converge on these plains because thousands of vulnerable newborns are stumbling to their feet for the first time. The photography during calving season is some of the best you will ever get anywhere in Africa because the terrain is flat, the light is golden, and the animals are everywhere. And the crowds? A fraction of what you will see during the river crossings later in the year.

March to April: The Long Rains Begin

When the long rains start, the herds begin drifting northward from the southern plains toward the central Serengeti. March can still offer excellent game viewing around Ndutu and the Kusini area because the herds have not fully moved yet. By April, the rains pick up and the herds spread out across the central Seronera valley.

Here is something most operators will not tell you. April is Tanzania's quietest tourism month and some lodges drop their rates significantly. If you are okay with afternoon showers, and honestly you should be because mornings are usually clear and the light is extraordinary, this is one of the best value months to visit. The landscape goes from golden brown to vivid green almost overnight. The birdlife hits its absolute peak with migrant species arriving from Europe and Asia. It is a completely different Serengeti and it is beautiful.

May to June: The Western Corridor

The herds push westward into the Grumeti area, chasing the rains and fresh grass. This is when the first big river crossings happen, but not at the Mara River. The Grumeti River gets the first drama. These crossings are smaller in scale but just as intense, and the Nile crocodiles here are some of the largest in all of Africa.

June is a transition month and one I love recommending to clients. The tail end of the rainy season gives way to dry skies, and the herds are typically strung out in long columns moving through the Western Corridor. What makes June special is that you can combine migration viewing with outstanding general game drives. The resident wildlife in the western Serengeti is incredible year round, especially the lion prides and hippo pools along the Grumeti River.

July to August: The Mara River Crossings

This is what most people picture when they think of the Great Migration. Two million animals funnelling toward the Mara River. Gathering on the banks in vast congregations. And then erupting across the water in a chaos of hooves, spray, and crocodile ambushes. It is exactly as dramatic as it sounds. And nothing, absolutely nothing, prepares you for the sound of it in person.

The herds begin reaching the northern Serengeti and the Mara River from late June, but the major crossings typically peak in July and August. A crossing can happen multiple times in a single day or not at all for three days straight. The animals are reading environmental cues that we cannot always predict. Patience is essential. The best guides understand the herds' patterns and position you where you need to be, but there are never guarantees on exact timing.

July and August are peak season. That means higher prices and more vehicles at popular crossing points. This is exactly where having a local operator like us makes all the difference. We know which crossing points attract fewer vehicles. We know which camps offer private concession access. And we read the herds' movements in real time rather than relying on last week's reports from a desk somewhere far away.

September to October: Mara and the Return

By September, large portions of the herds have either crossed the Mara River or already entered Kenya's Masai Mara. Crossings continue through September and into early October. You also start to see something fascinating called reverse crossings, where herds that already crossed into Kenya turn around and head back south into Tanzania as conditions shift.

October is one of those months that experienced safari travellers love. The herds begin fragmenting. Some animals are still in the northern Serengeti. Some are in the Mara. And the first groups are already drifting south again. The game viewing remains outstanding and October sits in a pricing sweet spot between peak season and green season rates. If you have flexibility on your dates, October is a month I often recommend.

November to December: Heading Home

The short rains arrive in November, pulling the herds back south through the eastern Serengeti. By December, the migration is in full southbound flow, heading toward the Ngorongoro Conservation Area and the southern Serengeti plains where the whole cycle will begin again with calving in January.

December safaris have a magic of their own. The combination of migration movement, lush green landscapes, newborn animals from non migratory species, and the festive season atmosphere at the camps creates something really special. Some of our most memorable client safaris have been December departures and I think more people should consider it.

How to Plan Your Migration Safari

The single most important decision is not which month to travel. It is who designs your itinerary. The migration covers an ecosystem of roughly 30,000 square kilometres. Being in the Serengeti does not automatically mean you will see the migration. You need to be in the right part of the Serengeti, at the right time, with a guide who understands daily herd movements and has real time ground intelligence.

At Westway Safaris, we design every migration itinerary around current conditions, not a fixed template. We are based in Arusha, the gateway city to the northern Tanzania safari circuit, and our ground network includes guides, camp managers, and pilots across the ecosystem who feed us daily positioning updates. When you travel with us, you are not following a brochure. You are following the herds.

The best migration safari is not the most expensive one. It is the one designed by someone who was tracking the herds yesterday, not someone reading about them from an office in London.

What Does a Migration Safari Cost?

Migration safaris typically range from $400 to $1,500 per person per day depending on the level of accommodation. A well designed 5 to 7 day itinerary with mid range to luxury lodges generally costs between $3,000 and $8,000 per person all inclusive. That covers accommodation, meals, game drives, park fees, and internal transfers.

The key variables that affect pricing are the season (July and August are peak), the accommodation tier (mobile tented camps versus permanent luxury lodges), and whether you include fly in transfers or travel by road. We always provide transparent, itemised quotes with no hidden fees. What you see is what you pay.