The Serengeti wildebeest migration (approximately 1.5 million wildebeest, 500,000 zebra, and 300,000 Thomson’s gazelle moving in a broadly clockwise annual circuit across the Serengeti-Mara ecosystem) follows a general pattern driven by rainfall and grass growth — the herds move toward fresh pasture, always following the rains. The migration is not a single event but a continuous movement, and “the best time” to see it depends entirely on which aspect of the migration you prioritise: calving (the southern Serengeti in January–February), river crossings (the Mara River in July–October), or the sheer spectacle of millions of animals on the move. This month-by-month calendar covers where the herds typically are in each month for 2025 planning.
January–February: Calving Season, Southern Serengeti
January–February is calving season — the southern Serengeti’s short-grass plains (Ndutu area, Kusini, and the Ngorongoro border zone) receive up to 8,000 wildebeest calves per day during the peak calving period (late January to mid-February). The concentrated, vulnerable calf population attracts extraordinary predator activity: cheetah (the southern plains have the Serengeti’s highest cheetah density during the calving season — 15–20 individuals regularly visible on a 3-hour drive), lion (prides feed on calves, concentrating near the birthing herds), hyena (in clans of 20–30 individuals following the calving herds in what is the most sustained single predator feeding event in East Africa), and jackal (opportunistic calf predators). The calf mortality rate during the first 2 weeks of life is 20–25% — the Serengeti calving season is simultaneously one of the most touching (within minutes of birth, a wildebeest calf can stand, walk, and follow its mother) and most brutal (predator concentrations around the calving herds produce constant kill scenes). Best base: Ndutu Lodge (the benchmark calving season camp), Ndutu Safari Lodge, or the Serengeti South/Kusini camps.
March–May: Movement North Through the Central Serengeti
March–May sees the herds beginning to move northward after the calving season concludes — the long rains begin in March, greening the central Serengeti and drawing the herds through the Seronera Valley and Lobo areas. The March–May period is the least-visited in the Serengeti (wet season, some roads become difficult) but produces high predator activity as the migration moves through the central sector and the permanent Seronera lion prides and cheetah are augmented by the following predators. May particularly is low season — some camps are closed, prices are at annual lows, and the wet landscape is beautiful even with reduced wildlife access on some tracks. April is the wettest month and the most logistically challenging for self-drive visitors.
June–July: Western Corridor and the Grumeti River
June–July sees the main herds moving into the Western Corridor (the Serengeti’s western extension toward Lake Victoria). The Grumeti River in the Western Corridor produces dramatic river crossings in June–July as the herds cross the Grumeti on their northward path — the Grumeti has the Serengeti’s largest Nile crocodile population (adults of 5+ m), and the crossings produce some of the most dramatic predator-prey scenes in the ecosystem. The Grumeti crossings are less famous than the Mara crossings but less crowded with tourists and often more accessible for the available vehicle density. Best base: Grumeti Serengeti Tented Camp, Serengeti Serena Safari Lodge (central, accessible to both western and northern sectors).
July–October: Mara River Crossings, Northern Serengeti
July–October is the Mara River crossing season — the herds’ northward movement brings them to the Mara River in the northern Serengeti and the Kenya Masai Mara (they cross the international border with complete indifference). The Mara River crossings (the most-photographed single event in the East Africa annual wildlife calendar) occur when the herds press against the river bank, hesitate for periods ranging from minutes to days, then a mass crossing is triggered — thousands of animals stampeding into the crocodile-filled river in a chaotic, churning mass. Crossing frequency: the herds may cross a given Mara River point 5–15 times per month during peak crossing season (August–September) — but crossings are entirely unpredictable by time of day. Positioning strategy: identify a specific crossing point at dawn (the Mara Triangle western crossings for Kenya-based visitors, the Bolongongobo-Kogatende crossings in the northern Serengeti for Tanzania-based visitors) and wait — sometimes 2 hours, sometimes 8. The best Serengeti-side crossing points: Sand River area, Kogatende Mara crossing, and Lamai Wedge. Best base: Lamai Serengeti (Asilia), Sayari Camp (Asilia), Serengeti Under Canvas north sector (Camp 3).
November–December: Return South
November–December sees the herds returning south after the short rains arrive — movement through the central Serengeti and eventual return to the southern plains by December. The central Serengeti (Seronera area) is well-positioned for November game drives as returning herds combine with resident Seronera wildlife and the late-year green-up produces good general game conditions. December calves begin to appear as early as late December (when the first synchronised births announce the approaching peak of the calving season in January–February).
