"When's the best time for the migration?" is the question we get asked more than any other, and the honest answer is: it depends what you want to see, because the migration is a year-round, circular event — not a single month.
January–March: Calving season, southern Serengeti
Around 500,000 calves are born in a few short weeks on the short-grass plains near Ndutu. It's also when predator action is at its most concentrated, since a lot of vulnerable young animals attract a lot of attention.
April–May: The long rains
The quietest, greenest months. Herds are dispersed across the southern and central Serengeti. Fewer vehicles, lower rates, and still excellent general game viewing — just don't come expecting river crossings.
June–July: The move north
The herds start their push north and west toward the Grumeti River, with the first river crossings of the year possible from June onward.
August–October: Mara River crossings
The headline event — herds crossing the Mara River between the northern Serengeti and Kenya's Maasai Mara, crocodiles included. This is the busiest and most photographed period, and vehicle numbers at popular crossing points reflect that.
November–December: The short rains, heading south
The herds turn back south toward the calving grounds, often via the eastern Serengeti. A good shoulder-season window — decent weather, thinner crowds, and the cycle beginning again.
The takeaway: there's no single "wrong" time to see the Serengeti, but if a river crossing specifically is the goal, plan for July through October and build in a few flexible days, since exact timing shifts year to year with the rains.
