When is the Great Migration in Tanzania? The Ultimate Month-by-Month Guide

Because the herds move constantly in search of fresh grass and water driven by rainfall patterns, knowing where to be during which month is the secret to a successful migration safari.

A common mistake travelers make is assuming the wildebeest leave Tanzania completely to spend most of the year in Kenya’s Maasai Mara. This is false.

Over 80% of the Great Migration's annual cycle takes place within Tanzania’s Serengeti National Park and Ngorongoro Conservation Area. Even during the river crossing months (July to October), massive portions of the 1.5-million-strong herd remain on the Tanzanian side of the Mara River in Kogatende and the Lamai Wedge.

You can witness the Great Migration in Tanzania every single month of the year—you simply need to be in the right region of the park.

📍 Location: Southern Serengeti & Ndutu Conservation Area

By late December, the short rains draw the herds down to the nutrient-rich, short-grass plains of the Southern Serengeti and Ndutu (which sits within the Ngorongoro Conservation Area). The soil here is rich in phosphorus and calcium, vital for pregnant and lactating wildebeest.

• January: Herds spread out across the Ndutu plains. Pregnant females prepare for birth as greenery peaks.
• February (Peak Calving): Over 500,000 wildebeest calves are born within a synchronized 2- to 3-week window. Up to 8,000 calves arrive daily!
• March: Newborn calves gain strength, running alongside their mothers within minutes of birth.

🦁 Why Visit During Calving Season?

The vast concentration of vulnerable young animals creates a magnet for predators. The Southern Serengeti during February features the highest density of lion, cheetah, leopard, and spotted hyena hunts anywhere on the continent.

Traveler Tip: Because Ndutu lies outside national park boundaries, off-road driving is permitted here, allowing safari vehicles to follow predator hunts up close.

📍 Location: Central Serengeti (Seronera) & Western Corridor (Grumeti River)

As the southern plains dry up and green grasses are depleted by millions of grazing animals, the mega-herd begins its march northwest toward the Western Corridor.

• April: The herds stretch out into long, marching columns up to 40 kilometers (25 miles) long, passing through the Central Serengeti (Seronera) and Moru Kopjes.
• May: Herds consolidate in the Western Corridor along the Mbalageti and Grumeti rivers.
• June: The rutting (mating) season begins. Male wildebeest battle fiercely for dominance while herds face their first major water barrier: The Grumeti River.

🐊 The Grumeti River Crossings

While less famous than the Mara River, the Grumeti River crossing in June is equally dramatic. Giant, hungry Nile crocodiles await the herds as they plunge into deep river channels.

Traveler Tip: April and May bring Tanzania's heavy "Masika" rains. While roads can be muddy, luxury lodges offer discounts up to 50% off, and you will experience the migration in near-total solitude.

📍 Location: Northern Serengeti (Kogatende, Lamai & Mara River)

By July, the dry season is in full force. The herds push into the far Northern Serengeti, drawn toward the permanent waters of the Mara River. This is the most famous phase of the Great Migration.

• July: First herds reach Kogatende and begin testing the banks of the Mara River.
• August: Peak river crossing season. Herds assemble on riverbanks in their thousands, building up tension for hours before a single wildebeest leaps into the churning water, triggering a frantic stampede.
• September: Herds crisscross the Mara River back and forth between Tanzania and Kenya, following localized rain showers.
• October: Herds graze the northern plains as the dry season reaches its finale.

🌊 What Makes the Mara River Crossing so Spectacle?

It is a display of raw survival. Herds must navigate steep, rocky cliffs, muddy riverbanks, rushing currents, hungry Nile crocodiles, and predators waiting on the opposite bank.

Traveler Tip: River crossings are unpredictable. Herds may gather at the water's edge for hours, only to turn around if they sense danger. Patience and an experienced driver-guide are essential!

📍 Location: Eastern Serengeti (Lobo) & Central Serengeti

When the first short rains ("Vuli") fall on the southern plains in late October or early November, the animals instinctively turn south to start their trek back to where the cycle began.

• November: The herds move down through the quiet, uncrowded Lobo and Loliondo areas in the Eastern Serengeti.
• December: Herds move through the Central Serengeti (Seronera) back toward Ndutu, arriving just in time for the lush green grass to nourish pregnant mothers before the next calving season.

To get the most out of your Great Migration safari, choosing the right style of accommodation is crucial:

1. Semi-Permanent Mobile Tented Camps (Recommended)

These luxury tented camps move 2 to 3 times per year following the exact location of the herds.

• December – March: Set up in Ndutu / Southern Serengeti for the calving season.
• July – October: Set up in Kogatende / Northern Serengeti for river crossings.
• Advantage: You stay within minutes of the herds, minimizing long transit drives.

2. Permanent Safari Lodges

Permanent lodges offer high-end amenities like swimming pools, brick walls, and paved walkways, but their location is fixed.

• Advantage: Exceptional luxury, stability, and year-round comfort.
• Consideration: If the herds move 2 hours north of your lodge, you will need to take longer game drives to reach them.

When planning your migration safari, consider combining regions and matching travel timing:

• For Beach Extensions: Pair a July–October Northern Serengeti safari with 4 days on the tropical beaches of Zanzibar.
• For Mountain Trekkers: Combine a January–February Calving Season safari with a Mount Kilimanjaro climb, as both offer clear, warm weather.
• For Detailed Weather Info: Check our comprehensive guide to Tanzania Weather by Month to pack correctly for cold mornings and warm afternoons.

Let our local Tanzanian experts build your dream itinerary! Whether you want to witness the dramatic Mara River crossings or the emotional Wildebeest Calving Season, contact Active Wonders Safaris today for a free, customized migration proposal.