The Great Migration in Africa happens all year, but where you should go depends on the month. The wildebeest herds generally spend January through March on the southern Serengeti plains for calving, move northwest from roughly April through June, reach the northern Serengeti and Kenya’s Maasai Mara during the dry-season months, then begin moving south again as the rains return.
If you’re hoping to see a particular part of the migration, two periods stand out: January through March for calving season and roughly July through October for potential Mara River crossings. River crossings are unpredictable, however. There is no fixed crossing date, and no safari operator can guarantee that the herds will cross while you’re there.
Table of Contents
Great Migration timing at a glance
| Months | Where the Herds Usually Are | What You May See |
|---|---|---|
| January–March | Southern Serengeti and Ndutu area | Calving, large herds, heavy predator activity |
| April–May | Central and western Serengeti | Herds gathering and moving northwest |
| June | Western Corridor toward northern Serengeti | Moving herds and possible Grumeti River activity |
| July–August | Northern Serengeti | Large herds and possible Mara River crossings |
| September–October | Northern Serengeti and Maasai Mara | Herds on both sides of the border and possible river crossings |
| November–December | Moving south through the Serengeti | Southbound migration following the returning rains |
These are approximate migration windows, not scheduled dates. Rainfall determines the growth of fresh grass and the availability of water, so the herds can arrive earlier or later from one year to the next.
Is there a Great Migration season in Africa?
There isn’t one short Great Migration season. The migration is a continuous annual cycle through the Serengeti-Mara ecosystem of Tanzania and Kenya.
More than a million wildebeest travel through the ecosystem along with hundreds of thousands of zebras, gazelles, and other grazing animals. They move in response to rainfall, fresh grazing, and water rather than following a fixed calendar.
The migration takes place across a huge landscape that includes Serengeti National Park in Tanzania and the Maasai Mara National Reserve in Kenya, along with neighboring conservation areas and reserves.
UNESCO describes the Serengeti migration as one of the world’s largest remaining unaltered animal migrations, with wildebeest and other ungulates making an annual circuit of roughly 1,000 kilometers through Tanzania and Kenya.
That means there isn’t really a bad month when the migration simply stops. The question is which part of the migration you want to see.
Great Migration month by month
January: Herds gather in the southern Serengeti
By January, large numbers of wildebeest are usually spread across the short-grass plains of the southern Serengeti and the Ndutu region near the Ngorongoro Conservation Area.
Rain has normally created fresh grazing here, drawing the animals into a relatively concentrated area. Calving may already be beginning, although February is generally the center of the main birthing period.
Travelers building a trip around this stage can use a Tanzania safari itinerary to combine the migration with other northern-circuit parks.
February: Peak calving season
February is one of the most distinctive months of the entire Great Migration. Huge numbers of wildebeest calves are born on the short-grass plains around the southern Serengeti and Ndutu.
The concentration of vulnerable young animals also attracts lions, cheetahs, hyenas, and other predators. For travelers who care more about predator behavior and newborn animals than river crossings, this can be one of the most rewarding times to see the migration.
The surrounding landscape is part of the larger system of African savannas that support both the grazing herds and the predators following them.
March: Calving season continues
Many herds remain in the southern Serengeti during March while the calves grow stronger. Conditions depend heavily on rainfall, and movement may begin as grazing changes.
January through March is therefore a better window than the Mara crossing season for travelers specifically interested in young wildebeest and predator-prey interactions.
April: The migration starts shifting north
During April, the herds generally begin leaving the southern plains and spreading northward and westward through the Serengeti.
This overlaps with Tanzania’s wetter period, so conditions can be muddier and visitor numbers may be lower than during peak season. The precise location of the largest concentrations can vary considerably with rainfall.
May: Long columns of wildebeest move northwest
By May, the migration is often noticeably on the move. Large columns of animals travel through the central and western Serengeti toward the Western Corridor.
This period doesn’t have the name recognition of calving season or the Mara crossings, but it can be spectacular because the movement itself becomes such a major part of the landscape.
June: Western Corridor and Grumeti
June is a transition month as many herds move through the western side of the ecosystem and continue toward northern Serengeti.
Some animals may cross channels associated with the Grumeti River during this period. These crossings tend to receive less attention than those on the Mara River farther north, but they form part of the migration’s broader journey.
If June fits your travel schedule, check the broader guide to the best time for a safari in Tanzania before choosing exact parks and accommodations.
July: Herds reach northern Serengeti
July is when attention increasingly shifts toward northern Serengeti and the Mara River.
Large numbers of wildebeest may begin arriving in the north, and river crossings can occur. But this is where Great Migration planning becomes less predictable.
A July trip does not guarantee a river crossing. The animals may wait along a riverbank, turn around, cross somewhere else, or move according to conditions that cannot be predicted months in advance.
August: Northern Serengeti and Maasai Mara
August is one of the best-known months of the migration. Herds can be spread across northern Tanzania and southern Kenya, with animals moving back and forth through the wider ecosystem.
Potential Mara River crossings are a major reason travelers visit during this period. It is also peak safari season, which means popular camps and prime migration areas can be busy and expensive.
For travelers considering the Kenyan side, the guide to the best time for safari in Kenya covers the country’s broader seasonal conditions beyond the migration itself.
September: Migration activity around the Mara
September is another strong month for travelers hoping to see large herds in northern Serengeti or the Maasai Mara.
Crossings may still occur, sometimes repeatedly, because the migration isn’t a single northbound crossing. Groups of animals can move between different grazing areas and cross rivers more than once.
The Maasai Mara also supports abundant resident wildlife, so a safari isn’t dependent entirely on catching a crossing. A guide to native animals in Kenya gives a better idea of what else may be seen.
October: Late northern migration
Many animals may still be in the northern part of the ecosystem during October, although the distribution of the herds can change as seasonal conditions shift.
Travelers deciding between the two countries should think about the whole itinerary rather than choosing solely based on the border. The comparison of a safari in Kenya vs Tanzania looks at the practical differences between the two.
November: The herds begin moving south
As seasonal rains return, the migration generally begins moving south from the northern areas and back through the Serengeti ecosystem.
November is harder to summarize with one precise location because rainfall influences how quickly the herds move and where fresh grazing appears.
December: Returning toward the southern plains
By December, many of the migrating animals are moving toward or arriving back in the southern Serengeti, beginning the cycle again.
Fresh grass following the rains draws the herds south, where pregnant wildebeest will eventually give birth during the coming calving season.
When is the best time to see the Great Migration?
The best month depends on what you actually want to see.
| If You Want to See… | Good Time to Consider | Where |
|---|---|---|
| Calving | January–March | Southern Serengeti / Ndutu |
| Peak calving activity | February | Southern Serengeti / Ndutu |
| Large moving herds | May–June | Central and western Serengeti |
| Potential Mara River crossings | July–October | Northern Serengeti / Maasai Mara |
| Southbound migration | November–December | Serengeti ecosystem |
For a first safari, don’t automatically assume the river crossing is the only part worth seeing. Calving season offers huge concentrations of animals and predator activity, while other months can provide large migrating herds with fewer vehicles around them.
The broader guide to the best time to go on safari in Africa is useful if the Great Migration is only one part of a larger trip.
When do the Mara River crossings happen?
Mara River crossings are generally associated with the period when the migration reaches the northern Serengeti and Maasai Mara, commonly from about July into October.
But there are no reliable Great Migration crossing dates.
The wildebeest don’t reach the river on a schedule. Rainfall and grazing conditions influence their movements, and a herd that appears ready to cross can remain near the river for hours or days before moving somewhere else.
Crossings also aren’t one single event. Different groups may cross at different points throughout the season, and animals can cross between Tanzania and Kenya more than once.
Tanzania National Parks maintains specific rules around Mara River crossing sites to reduce disturbance from safari vehicles. Visitors and guides are expected to remain in designated viewing areas and avoid interfering with animals approaching the river.
See the Serengeti National Park Mara River crossing guidelines for the park’s rules around these sites.
Is the Great Migration better in Tanzania or Kenya?
Most of the annual migration takes place within Tanzania’s Serengeti ecosystem, while Kenya’s Maasai Mara becomes especially important during the northern part of the cycle.
Tanzania makes more sense for calving season because the herds gather on the southern Serengeti plains. It also gives travelers access to the western and northern stages of the migration later in the year.
Kenya becomes particularly attractive when the herds are using the Maasai Mara, generally during the dry-season portion of the migration.
Either country can produce an excellent safari without a dramatic river crossing. Resident lions, elephants, cheetahs, giraffes, and other wildlife remain a major part of the experience.
If Tanzania is the priority, start with the Tanzania safari guides. For the Kenyan side, see the Kenya safari guides.
How long should you spend on a Great Migration safari?
Trying to see the migration in one or two game drives leaves a lot to chance. The herds move over an enormous area, and wildlife never works to a timetable.
Spending several nights in the part of the ecosystem where the migration is expected gives you more opportunities to locate the herds and allows time for normal game viewing even if a crossing or major movement doesn’t happen immediately.
A longer itinerary can also combine migration areas with places such as Ngorongoro, central Serengeti, or other reserves rather than making the entire trip dependent on one wildlife event. Travelers using the Kenyan side can similarly build the Mara into a broader Kenya safari itinerary.
How much does a Great Migration safari cost?
Migration-season pricing varies enormously depending on the country, camp, group size, and time of year.
Peak months around the northern Serengeti and Maasai Mara can command higher accommodation rates because demand is strong and the best-positioned camps have limited space. Calving season can also be expensive at properties close to the herds.
For realistic planning ranges, start with the guide to African safari costs. Travelers focused specifically on Tanzania can also compare the cost of a safari in Tanzania.
Planning around the migration without overplanning
The most important thing to understand is that a Great Migration safari is about putting yourself in the right general region at the right time of year, not choosing a guaranteed date.
- Choose the stage first. Decide whether calving, moving herds, or potential river crossings matter most to you.
- Choose the region second. Southern Serengeti, western Serengeti, northern Serengeti, and Maasai Mara are useful at different times.
- Allow several days. More time gives guides a better chance of finding the strongest wildlife activity.
- Don’t build the trip around one crossing. The migration is impressive even when no animals happen to be entering the river.
- Book peak locations early. Well-positioned camps can fill far ahead of the busiest migration months.
If this will be your first wildlife trip to the continent, the guide to the best African safaris for first-time visitors can help put the migration in context with other destinations.
What to pack for a migration safari
Your packing list depends more on the country and season than on the migration itself. Early-morning game drives can be surprisingly cool, while midday conditions can become hot and dusty.
Binoculars are particularly useful because the migration can stretch across huge areas. A camera with a telephoto lens is helpful for wildlife photography, but don’t assume you’ll always be close to a river crossing or predator interaction.
For destination-specific advice, compare what to pack for a Tanzania safari with the guide to packing for safari in Kenya.
The simplest way to choose your Great Migration dates
If you mainly want calves and predator activity, look at the southern Serengeti from January through March, with February especially important.
If you want to see huge herds actively moving through the Serengeti, consider the middle part of the year as they travel north.
If your priority is a chance of seeing a Mara River crossing, northern Serengeti and the Maasai Mara from roughly July through October are the traditional areas to consider, while remembering that crossings themselves cannot be scheduled or guaranteed.
The Great Migration is not a single event with one ideal date. It is a year-round cycle, and choosing the right month simply determines which chapter of it you’re most likely to see.
