Best Time to See the Great Migration: Month by Month

The best time to see the wildebeest migration depends on which part of it you want. For newborn calves and predators on the southern plains, go between January and March. For the dramatic Mara River crossings in the north of the Serengeti, go between July and October, with August and September the most cited months. The herds never stop moving, so the real question is where they are in the month you can travel.

The Great Migration is a circle, not an event

The Serengeti Great Migration is a year-round loop of roughly 1.3 to 1.5 million wildebeest, joined by hundreds of thousands of zebras and Thomson's gazelles, and followed by lions, hyenas, cheetahs and crocodiles. Together they travel clockwise through the Serengeti ecosystem in Tanzania and the Masai Mara in Kenya, a loop that is commonly quoted at around 800 kilometres or more.

What drives the loop is rainfall and grass. The herds follow the rains toward fresh, nutrient-rich grazing, so the exact dates shift every year. Anything you read about the Great Migration in Tanzania by month, including this article, describes a typical pattern, not a timetable. Treat every date as "typically" and "depends on the rains".

One more point worth knowing: the herd is not a single column. At any moment it is spread over many kilometres in several large groups, with stragglers and splinter herds. That is why a week of good sightings is almost always possible somewhere in the ecosystem, and why a guide's local knowledge matters more than a calendar.

January to March: Ndutu and the calving season

From roughly December or January, the herds gather on the short-grass plains of the southern Serengeti and the Ndutu area, on the edge of the Ngorongoro Conservation Area. Volcanic ash soils here grow grass rich in minerals, which suits lactating mothers and growing calves. This is the Ndutu calving season, and it is the best answer to "when is the wildebeest calving season in Serengeti?"

Most calves are born in a concentrated window, typically from late January through February, and sometimes into March. A figure you will see often is about 8,000 calves born on peak days, with season totals quoted from 250,000 to 500,000. Those numbers are widely repeated by operators and are best read as a sense of scale, not a precise count. What you can count on is the sight: thousands of newborns standing within minutes of birth, because a calf that cannot run with the herd will not survive.

Where there are calves there are predators. Lions, spotted hyenas and cheetahs hunt the plains openly, so this is one of the best periods for seeing predation without long drives. The landscape is green, the light is soft, and the plains are open enough that the action is easy to follow.

Expect short rain showers, fewer vehicles than in peak July to September, and herds that move around the Ndutu woodlands and plains depending on where the rain fell. If you want to build a trip around this, our Ndutu calving season package is designed around this window.

April to June: central Serengeti and the Grumeti

As the southern grass dries, the herds drift north and west. April and May are the long rains, when the herds are typically spread through the central Serengeti around Seronera and the Moru Kopjes area. This is the quietest, greenest stretch of the year. Camps and roads are less busy, and the rains can make some tracks slow, but sightings of big cats are still good.

In late May and June, the herds often gather for the rut, the mating season, when males hold small territories and the noise carries for kilometres. Then the columns turn toward the Western Corridor and the Grumeti River. Crossings here usually happen in June and July, and they tend to be smaller and less predictable than the Mara River crossings, partly because the Grumeti is a narrower river with large crocodiles.

If you are travelling in this period, think of it as a trade-off. You will not see the famous river scenes every day, but you will see huge herds in an open landscape without the crowds. It is also a good time to combine a migration safari with other parts of northern Tanzania.

July to October: Northern Serengeti and Mara River crossings

This is the period that most people mean when they ask about the best time to see wildebeest migration crossings. From July the vanguard of the herd typically reaches the northern Serengeti around Kogatende, and the Mara River becomes the main obstacle. Crossings are most often reported from late July through September, and can continue into October and sometimes early November, depending on the rains and the state of the river.

A Mara River crossing is not scheduled. Herds gather on the bank, sometimes for hours or days, then either plunge in suddenly or turn back. Crocodiles wait in the water, and the current and steep banks cause injuries and drownings. Because nobody can predict a crossing, the best strategy is time: a few days in the north gives you a far better chance than a single morning.

This is also the dry season, which means clear skies, cool mornings, dusty afternoons and the highest demand of the year. If you plan to travel between July and October, book early, since there are limited places to stay near the river. Remember that the same herds cross back and forth in some years, so a crossing on the Tanzania side does not mean the animals have left for Kenya for good.

Serengeti or Masai Mara?

The herds spend roughly July to October in the north, and the Mara River marks the border area between Tanzania and Kenya. Which side you visit is a separate choice involving crowds, access and cost. We compare them in Serengeti vs Masai Mara: which to choose.

November to December: the return south

When the short rains arrive in late October or November, the herds begin the journey back south. They typically pass through the eastern and central Serengeti, around the Lobo area and Seronera, on the way toward the southern plains. The movement is gradual, and the timing depends on when and where the rain falls.

November and December are underrated. The grass is green, crowds are thin, and herds, including many zebras, stream south in long lines. By December the leading groups are often back on the southern plains and the cycle starts again, with the first heavily pregnant females preparing to calve. If you want migration scenery without peak-season prices or crowds, this is worth considering.

How to choose your month

Start with what you most want to see, then check the practical constraints.

• Calves and predators: January to March, southern Serengeti and Ndutu. February is typically the heart of the calving.
• River crossings: July to October, northern Serengeti. August and September are the most reliable and most cited months, though nothing is guaranteed.
• Fewer people and green landscapes: April to June or November to December.
• The mating season and big herds on open plains: late May to June.
• A balance of timing and comfort: late June and early July, when the Grumeti and early northern crossings may overlap.

Your school holidays, work leave and budget will narrow things quickly. If you are flexible, choose the part of the migration first and then the dates. If you are not, ask where the herds are likely to be in your week and pick the area to match. Our Great Migration safari package is built around following the herds, and you can see everything we offer on the all safari packages page.

How long to stay and where to base yourself

Because the herds are spread out and move constantly, a short trip can miss them. Four or five days in the Serengeti is a sensible minimum, and more if you are hoping for a river crossing. We go into this in how many days do you need for a Tanzania safari.

In the south, base yourself in or near Ndutu from January to March. In the north, base yourself near the Mara River in July to October. In between, a central location such as Seronera works well, and in the Western Corridor you may want a base for June and July. Moving between areas costs driving time, so one or two well-chosen bases usually beats constant packing and unpacking.

Our trips come at three price levels: Experience only, With accommodation, and All inclusive. Rates change with season, so check the safari packages page or talk to us on WhatsApp or the contact page for a current quote. If you are weighing cost, what drives the price of a Tanzania safari explains the main factors.

Practical tips for migration safaris

• Book early for July to October. Places to stay near the Mara River are limited, and demand is highest in August and September.
• Plan for flexibility. Herds change direction. A good itinerary includes spare days and a guide who is willing to move to where the animals are.
• Be patient at the river. Crossings can take hours of waiting. Bring water, snacks, a hat and a good seat position, and keep your camera ready.
• Pack for temperature swings. Mornings on open vehicles are cold and afternoons are hot. Our guide to what to wear on safari in three temperatures covers it.
• Bring binoculars and a zoom lens. Herds can be far away, and crossings are often watched from a distance set by park rules.
• Follow park rules. Vehicles keep back from the river banks to avoid disturbing the animals, and that is what keeps crossings happening.
• Consider a walking safari. Most of our packages include a free 2-hour walking safari, subject to park rules, which gives a very different view from a vehicle. See walking safari vs game drive.
• Check official sources for entry, health and visa requirements before you travel, since they change.

Travelling with children is possible in many seasons. Children under 4 travel free on most packages, and our family safari in Tanzania with kids article helps you decide what suits your family. For wider planning, the travel guide covers seasons, costs and logistics in one place.

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