Serengeti Wildebeest Migration: Monthly Breakdown & Best Viewing Seasons

Understanding the Migration Cycle

The Serengeti migration calendar follows a roughly circular route driven entirely by rainfall and grazing, not a fixed schedule. Over 1.5 million wildebeest, joined by hundreds of thousands of zebra and gazelle, move in a continuous loop through the Serengeti-Mara ecosystem, spending each month in a different region depending on where the grass is greenest.

That means there’s no single “best month” for everyone — the right time depends on whether you want to see newborn calves, dramatic river crossings, or the herds simply spread across open grassland. Below is a full Serengeti by month breakdown so you can match your trip to the specific chapter of the migration story you want to witness.

December: Herds Arrive in the Southern Plains

As the short rains taper off, the migration moves south into the short-grass plains around Ndutu and the southern Serengeti, spilling into the Ngorongoro Conservation Area. Grass here is nutrient-rich after the rains, drawing the herds in ahead of calving season. Expect large, loosely scattered groups rather than tight columns, plus strong resident predator activity as lions and hyenas anticipate the coming calving boom.

January: Calving Season Begins

By early January, the southern plains are dense with wildebeest as calving season gets underway. Around 8,000 calves are born daily during this window, almost all within the same few weeks — a survival strategy that overwhelms predators with sheer numbers. This is one of the best times to see the migration if young animals and intense predator-prey action are your priority.

February: Peak Calving in Ndutu

February is calving season at its peak. Newborn calves, still wobbly on their legs within minutes of birth, blanket the Ndutu and southern Serengeti plains alongside their mothers. Predator activity is exceptional — cheetahs, lions, and hyenas are all drawn to the vulnerable young, making this arguably the single best month for predator sightings anywhere in the migration calendar.

March: Plains Life Continues, Rains Approach

The herds linger on the southern plains through early March, with calves now stronger and more mobile. As the long rains approach, grass across the south begins to thin, and the first signs of restlessness appear — smaller breakaway groups start testing routes north and west ahead of the main migration’s departure.

April: The Long March Northwest Begins

April brings the long rains and the true start of the migration’s northward journey. Herds break from the southern plains and move in long columns through central Serengeti, passing through the Seronera Valley. This is a quieter month for tourism thanks to heavier rains, but it offers a genuinely dramatic view of the migration in full, purposeful motion.

May: Into the Western Corridor

By May, the migration has pushed into the western corridor toward the Grumeti River. This month also marks the start of the rut, or mating season — males become notably more aggressive, with frequent clashes for dominance. Grass here is still lush from the rains, and herds tend to spread wide across the corridor.

June: Grumeti River Crossings

As the dry season sets in, the herds concentrate along the Grumeti River, and the first river crossings of the year begin. While smaller and less famous than the Mara crossings later in the year, Grumeti crossings come with their own danger — some of the largest Nile crocodiles in Africa wait in these waters. June is an excellent, less crowded alternative to the peak-season crossings further north.

July: Push Toward the Mara River

By July, dry-season conditions have pushed the herds into the northern Serengeti, gathering along the Mara River in growing numbers. This is the build-up to the migration’s most famous spectacle. Expect large, tense herds pacing the riverbanks for days at a time, testing the water before committing to a crossing.

August: Peak Mara River Crossings

August is peak migration season and the answer most guides give when asked about the best time migration travelers should target. Mara River crossings happen almost daily, with herds leaping into fast-moving, crocodile-filled water in chaotic bursts of thousands of animals at once. This is the single most in-demand month on the entire migration calendar — camps here book out earliest and furthest in advance.

September: Crossings Continue in the Mara

Crossings continue through September as herds move back and forth between the Serengeti’s northern reaches and Kenya’s Masai Mara in search of remaining grass. Dry conditions keep the herds concentrated near the river, and this month offers Mara River crossing odds nearly as strong as August, with noticeably fewer crowds.

October: The Return South Begins

As grass in the north depletes, the herds begin their long journey back south, moving out of the Masai Mara and through the northern and eastern Serengeti. October is a transitional month — quieter than peak season but still rewarding, with herds moving in large, visible groups across open country.

November: Short Rains Push Herds South

The short rains arrive in November, triggering fresh grass growth across the eastern and southern Serengeti and pulling the herds back toward Ndutu and the southern plains. By late November, the migration is once again approaching the southern grasslands where calving season will soon begin — completing the full annual cycle.

Best Time to Visit, By Priority

Since the migration calendar shifts every month, the “best time” genuinely depends on what you want to see:

• Calving season and predator action: late January through February, in the Ndutu/southern Serengeti.
• River crossings and drama: July through September, in the northern Serengeti and Mara River area — August is peak, September offers similar odds with fewer crowds.
• Fewer crowds, still rewarding: June (Grumeti crossings) or October–November (return south).
• Best overall value: late June or early September, just outside the absolute peak, with strong wildlife activity at lower rates and easier camp availability.

Because top camps along the migration route book out six to twelve months ahead for peak months, deciding which chapter of the migration you want to see first — then booking early around it — matters more than chasing a single “perfect” date.

FAQs: Serengeti Migration Calendar