Every year, 1.5 million wildebeest travel 3,000 km in the greatest wildlife spectacle on earth. Timing is everything — here is the complete month-by-month guide.
Contrary to popular belief, the Great Migration never stops. This perpetual cycle offers a different spectacle every month: mass births, epic Mara River crossings, herds stretching as far as the eye can see. The real question isn't whether to go — but what you want to witness.
This expert calendar guides you month by month to choose your perfect timing based on your priorities: river crossings, calving, wildlife photography, or simply losing yourself in the endless Serengeti plains.
January marks one of the most moving events of the Great Migration: the start of the calving season on the Ndutu plains. Herds gather in the southern Serengeti and Ngorongoro Conservation Area, where short, nutrient-rich grass provides the best conditions for raising newborns.
The spectacle is breathtaking: up to 8,000 wildebeest are born every day at peak calving. This concentration of vulnerable prey draws an exceptional density of predators — lions, cheetahs, hyenas and wild dogs at their most active.
February is the most intense month of the calving season. Within two to three weeks, over 500,000 wildebeest are born on the Ndutu plains. This unique biological phenomenon — known as synchronised calving — is a survival strategy: overwhelming predators by all being born at the same time.
The spectacle is of rare intensity. The plains resemble a vast open-air nursery, with young wildebeest standing within minutes of birth. Cheetahs and lions are spoilt for choice.
The plains begin to dry. The herds sense that northern pastures are greener and begin their northward journey towards central Serengeti. This is the start of the great journey that will last all year. In March, you can still witness the last births while observing the first signs of departure.
The long rains season begins. Tracks can be difficult to navigate, but Tanzania turns lush green and wildlife concentrates around water sources.
April is the rainiest month of the year. The herds slowly cross central Serengeti heading north-west. This is the low season: fewer tourists, reduced lodge rates, and a wild, verdant Tanzania that few travellers ever discover.
While some tracks can be muddy, the rewards are unique: zero crowds on game drives, undisturbed wildlife, and breathtaking green savannah landscapes.
The rains ease. The wildebeest form their famous impressive columns — lines stretching for several kilometres — flooding the Moru Kopjes in the centre of the park. The spectacle of thousands of animals moving in perfect unison is hypnotic.
May marks the beginning of the transition to the dry season. Vegetation is still green but movements intensify. It is also the rutting season: male wildebeest fight ferociously to mate, delivering spectacular scenes.
The herds reach the western corridor of the Serengeti and mass on the banks of the Grumeti River. The tension is palpable: thousands of wildebeest face their first water obstacle, home to some of Africa's largest crocodiles.
June marks the start of high season. The first Grumeti crossings can occur towards the end of the month. The dry season settles in with its golden light and clear skies — a photographer's paradise.
July is the most sought-after month for the Great Migration. The herds reach the northern Serengeti and begin the epic Mara River crossings — the most dramatic moment of the migration cycle. Thousands of wildebeest plunge into crocodile-infested waters in an unforgettable collective frenzy.
No crossing is ever guaranteed — that is precisely what makes the spectacle unique. Our expert guides know the ideal vantage points and can read the warning signs. July also marks the start of peak tourist season: book well in advance.
August is often considered the best month for Mara River crossings. The herds shuttle between the Masai Mara (Kenya) and northern Serengeti (Tanzania), crossing the river in both directions multiple times a day. Nile crocodiles are at their prime hunting condition.
The density of wildebeest per square kilometre is at its peak. Land predators — lions, cheetahs, hyenas — also take full advantage of this exceptional concentration. This is the pinnacle of the safari experience.
Mara crossings continue in September, often with fewer crowds than August. The herds gradually begin their return south through the Serengeti. This is an excellent window to combine river crossings with exploring the less-visited central Serengeti.
September remains in full dry season: impeccable skies, warm light, and sparse vegetation that makes wildlife visibility at its peak. A month often overlooked but beloved by those in the know.
October marks the return of the herds. The wildebeest face another Mara crossing — this time in reverse — to regain the Tanzanian Serengeti. Waters swollen by the first rains make this obstacle even more perilous.
Short rains appear towards the end of the month, gradually greening the plains. This is an excellent time to observe the migration during a transitional period, with softer rates than peak summer.
The short rains transform the savannah. Tanzania puts on its finest colours: the Serengeti plains turn a deep green, water sources fill up, and migratory birds arrive in waves. The herds follow this new lush growth southward.
November is a magnificent and very uncrowded month. Lodges offer their best rates. Resident wildlife — leopards, elephants, buffalos — is particularly active after the dry season. Ideal for photographers who avoid the crowds.
In December, the herds return to the Ndutu plains in the southern Serengeti, completing the annual cycle of the Great Migration. Pregnant females arrive to give birth. The first pre-season births already create an intense predation spectacle.
December combines the best of two seasons: still relatively dry early in the month, then the rains intensify. The festive season coincides with the herds' arrival in the south — a special magic for a Christmas or New Year safari.
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