The Great Wildebeest Migration: Complete Month-by-Month Guide

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The Great Wildebeest Migration is the largest movement of land mammals on Earth. Every year, approximately 1.5 million wildebeest, 200,000 zebra, and 300,000 Thomson’s gazelle complete a continuous clockwise circuit across the Serengeti-Mara ecosystem — roughly 1,800km of grassland, woodland, and river crossings spanning northern Tanzania and southwestern Kenya.

It never stops. It has no fixed start date and no fixed end date. The herds are always moving, driven by rainfall, fresh grass, and instinct refined over millennia. Understanding where the Migration is and what it is doing at any given time is the key to building a Serengeti itinerary that puts you in the right place.

What Is the Great Migration?

The Migration is driven by a single impulse: the search for fresh grass. The wildebeest follow the rains across the ecosystem in a broadly predictable pattern that repeats each year with enough consistency to plan around — but never with enough precision to guarantee.

The circuit begins and ends in the southern Serengeti. Calving occurs on the short-grass plains of the Ndutu area from January to March, when the rains bring nutritious new grass perfectly timed for the birth of up to 500,000 calves. The herds then move north through the central and western Serengeti as the long rains push fresh growth ahead of them. By July, the leading edge of the migration reaches the Mara River — the northern boundary — and the famous river crossings begin. By November, the cycle reverses and the herds return south to calve again.

Predators follow every step. The Migration does not just move wildebeest — it fuels lion, cheetah, leopard, hyena, and crocodile in enormous numbers across the entire ecosystem.

Month-by-Month Migration Calendar

January — Calving Season Begins

Where: Southern Serengeti — Ndutu area (bordering Ngorongoro Conservation Area)

What’s happening: The short-grass plains of Ndutu are the calving grounds. Up to 500,000 wildebeest calves are born in a concentrated 3–4 week window, timed to coincide with the peak nutritional value of the new grass. The synchrony is deliberate — flooding the ecosystem with vulnerable calves overwhelms predators’ capacity to kill, ensuring enough survive.

What you’ll see: Cheetah mothers hunting with cubs, lion prides working the calving grounds, spotted hyena clans in extraordinary numbers, newborn calves taking their first steps within minutes of birth. This is one of the most dramatic wildlife spectacles on the continent. The predator density per square kilometre during calving season is among the highest recorded anywhere.

Camp placement: Ndutu area — Ndutu Safari Lodge, Serengeti Safari Camp’s seasonal Ndutu camp, &Beyond’s Ndutu-area mobile camp.

Crowd level: Moderate — fewer visitors than peak season but growing in recognition.

February — Peak Calving

Where: Southern Serengeti — Ndutu and adjacent short-grass plains

What’s happening: Peak calving. An estimated 8,000 calves per day are born during the peak fortnight. The interaction between enormous numbers of predators and enormous numbers of prey results in a continuous, overlapping series of hunts, kills, and chases across a visually open landscape that makes observation straightforward.

What you’ll see: The full spectrum of predator behaviour. Cheetah hunts unfold in full view on flat open plains — the cheetah’s preference for open ground makes Ndutu ideal. Lion prides work cooperatively on the fragmented herds. Hyena clans, often in groups of 20–30, work around the edges. Nile crocodile concentrate in the seasonal pans.

Camp placement: As January — southern Serengeti / Ndutu area only.

Crowd level: Low to moderate. An underrated month.

March — Herds Begin Moving North

Where: Southern and central Serengeti

What’s happening: As the long rains approach from the north, the herds begin their annual migration northward. The movement is gradual — not a single dramatic departure, but a slow drift as the grass ahead freshens and the southern grass depletes. By late March, columns of wildebeest are moving through the central Serengeti’s Seronera area.

What you’ll see: Long columns of wildebeest in motion — one of the great visual spectacles of the Migration. The resident wildlife of the Seronera area (excellent year-round for lion and leopard) is supplemented by the first wave of migrating herds.

Camp placement: Central Serengeti — Seronera area and surrounding regions.

Crowd level: Low.

April — Long Rains and Northward Movement

Where: Central and western Serengeti

What’s happening: The long rains fall across the Serengeti, greening the landscape dramatically. The herds move through the central and western Serengeti, some reaching the western corridor (Grumeti River area). Road conditions can be challenging during heavy rains, but fly-in access remains reliable.

What you’ll see: Lush landscape, strong lion and leopard activity in the Seronera area, early arrivals in the western corridor. The visual drama of the Migration in full transit — columns stretching to the horizon.

Camp placement: Central Serengeti (Seronera) or western corridor depending on herd movement.

Crowd level: Very low. Good value.

May — Western Corridor and Grumeti

Where: Western corridor — Grumeti River area

What’s happening: Large numbers of wildebeest and zebra consolidate in the western corridor. The Grumeti River crossings begin — crocodile in the Grumeti are notorious, and while the Grumeti crossings attract less attention than the Mara River, they deliver the same dramatic theatre on a slightly smaller scale.

What you’ll see: Grumeti River crossings (crocodile vs wildebeest), excellent lion activity in the western corridor, good cheetah on the open plains. Fewer visitors than peak season means exclusive sightings.

Camp placement: Western corridor — Grumeti-area camps (Kirawira, Singita Grumeti, Serengeti Migration Camp).

Crowd level: Low. Excellent value for a dramatic experience.

June — Consolidation Before the Push North

Where: Western corridor and central Serengeti

What’s happening: The herds are preparing for the final push north toward the Mara River. June can be one of the most dramatic months in the western corridor as large concentrations build before moving. The first herds begin to reach the northern Serengeti.

What you’ll see: Very large herds — sometimes hundreds of thousands of animals visible simultaneously on the open plains. The Grumeti crossings continue. Early arrivals at the northern boundary.

Camp placement: Western corridor or begin considering northern Serengeti camps.

Crowd level: Low to moderate. Underrated.

July — Mara River Crossings Begin

Where: Northern Serengeti — Lamai/Kogatende area, Mara River

What’s happening: The moment most people associate with “the Migration.” The wildebeest herds reach the Mara River, which forms the boundary between Tanzania and Kenya. To reach the Masai Mara’s fresh grass on the other side, they must cross — through deep water, powerful currents, and enormous Nile crocodile.

The crossings are unpredictable. Herds can mass at the river’s edge for hours or days before the lead animals commit. When they go, they go in waves — thousands of animals at a time plunging in, scrambling up the far bank, and running. Crocodile launch from concealed positions. Lions wait on the banks. The chaos and scale is unlike anything else in Africa.

What you’ll see: River crossings (if timing aligns — never guaranteed). Enormous predator density. The most photographic wildlife scenario in Africa.

Camp placement: Northern Serengeti — camps near the Mara River north bank. Lamai Serengeti, Four Seasons Migration Camp, Sayari, Lemala Kuria Hills. Book 12+ months in advance for July–October.

Crowd level: High — peak season. The most visited period in the Serengeti.

August — Peak Crossing Season

Where: Northern Serengeti and Masai Mara

What’s happening: August is statistically the most likely month to witness dramatic river crossings. The herds are fully north of the Mara River and are moving between Tanzania and Kenya in both directions as grass conditions shift. Multiple crossings can occur daily at peak periods.

What you’ll see: River crossings (best probability), enormous predator activity, spectacular photography, the full dramatic scale of the Migration in action.

Camp placement: Northern Serengeti (Tanzania side) or Masai Mara camps (Kenya side).

Crowd level: Peak — book 12+ months in advance. This is the most in-demand period across the entire ecosystem.

September — Crossings Continue

Where: Northern Serengeti and Masai Mara

What’s happening: Crossings continue into September, typically with slightly fewer animals but continued intensity. The weather is reliably dry and clear. By late September, some of the first southward-movement hints appear.

What you’ll see: River crossings still active, strong predator activity, excellent photography conditions.

Camp placement: Northern Serengeti.

Crowd level: High but slightly less than August.

October — Return South Begins

Where: Northern and central Serengeti

What’s happening: As the short rains approach from the south, the herds begin their return migration. The southward movement is typically less dramatic visually than the northward push, but the columns of wildebeest returning through the Serengeti’s golden dry-season plains are still extraordinary.

What you’ll see: Herds in transit through the central Serengeti, strong resident wildlife activity.

Camp placement: Central Serengeti — Seronera.

Crowd level: Moderate.

November — Short Rains and Southern Return

Where: Central and southern Serengeti

What’s happening: The short rains freshen the southern Serengeti, pulling the herds back toward the calving grounds. Migratory birds arrive. The landscape begins to green. The cycle prepares to repeat.

What you’ll see: Herds in transit, excellent birding, fresh green vegetation beginning.

Camp placement: Central or southern Serengeti.

Crowd level: Low.

December — Pre-Calving Southern Concentration

Where: Southern Serengeti — Ndutu area

What’s happening: The herds are concentrating on the southern short-grass plains ahead of the January calving season. By late December, the first calves begin to appear. The predator density is building in anticipation.

What you’ll see: Large herds on the short-grass plains, early calving activity, building predator presence.

Camp placement: Southern Serengeti / Ndutu area.

Crowd level: Low to moderate.

What Makes a Migration Sighting — Planning Realities

River crossings are never guaranteed. The timing of individual crossings is unpredictable — determined by lead animal behaviour, river levels, and the herds’ internal dynamics. In a good week during July–September, multiple crossings may occur daily. In a poor week, the herds may mass at the bank and refuse to cross for days. Experienced guides position vehicles at likely crossing points, but wildlife does not follow schedules.

A week is the minimum. To maximise the probability of witnessing a crossing, stay a minimum of 5–7 nights in the northern Serengeti during July–October. Shorter stays significantly reduce your chances.

The whole Migration is the attraction. Experienced safari travellers who have done the crossings often say the calving season (January–March) is a more intimate and equally dramatic experience. The choice of when to visit should be based on what kind of experience you want — not just which months are most famous.

Frequently Asked Questions — Great Migration Serengeti

When is the best time to see the Great Migration?

There is no single “best time” — the Migration is year-round. For the famous Mara River crossings, July–October is the window, with August statistically the strongest month. For calving season and extraordinary predator action, January–March in the southern Serengeti/Ndutu area is exceptional and less crowded than the crossing season.

How long does the Great Migration last?

The Great Migration is continuous — it never ends. The herds complete an annual circuit and immediately begin again. The commonly referenced “Migration season” (July–October) refers specifically to the period when the herds are at the Mara River crossing area, but impressive Migration wildlife can be experienced in every month.

How many wildebeest are in the Great Migration?

Approximately 1.5 million wildebeest form the core of the Migration. They are accompanied by an estimated 200,000 Burchell’s zebra and 300,000 Thomson’s gazelle. In total, approximately 2 million animals complete the circuit annually — the largest terrestrial wildlife migration on Earth.

Is the Great Migration only in the Serengeti?

No. The Migration circuit covers both the Serengeti National Park (Tanzania) and the Masai Mara National Reserve (Kenya), crossing the international border twice annually. The Serengeti covers the majority of the circuit — approximately 11 months of the year — with the herds spending roughly 2–3 months in Kenya’s Masai Mara during the peak crossing season (July–October).

Can you predict exactly when a river crossing will happen?

No. River crossings cannot be predicted to a specific day or time. Guides identify high-probability crossing points and times based on herd movements and river conditions, but the decision to cross is made by lead animals and is influenced by factors that cannot be forecast reliably. Witnessing a crossing requires patience and the right timing — which is why a minimum stay of 5–7 nights at a northern Serengeti camp during July–October is strongly recommended.

How do I get to the Serengeti for the Migration?

The most efficient access is to fly into Kilimanjaro International Airport (JRO) near Arusha, Tanzania, then take a light aircraft transfer directly to an airstrip in the relevant Serengeti zone (north, central, or south, depending on the time of year). Fly-in is strongly recommended — the road from Arusha to the northern Serengeti takes 8–10 hours. African Safari Group can arrange the complete logistics including international connections, domestic flights, and camp transfers.

African Safari Group is building its East Africa portfolio. To register your interest in a Serengeti Migration itinerary and be among the first to access our Tanzania programmes when they launch, contact us here.