When is the Great Migration in Tanzania?

The Great Migration is in Tanzania year-round, moving continuously through the Serengeti ecosystem in a clockwise loop driven by seasonal rains and grazing conditions.

The Great Migration stays in Tanzania from December through July, with calving in the southern Serengeti (January-March), the western corridor crossings (June-July), and northern Serengeti crossings (July-October). The herds then move into Kenya's Maasai Mara (August-October) before returning south in November. Plan your Tanzania visit around either calving season or river crossings for peak drama.

Key takeaways

• The Great Migration follows a 1,800-mile annual circuit through Tanzania's Serengeti and Kenya's Maasai Mara, with roughly 1.5 million wildebeest and 250,000 zebra.

• Calving season (late January through February) in the southern Serengeti produces 8,000 calves daily and attracts dense predator concentrations around Ndutu and the Ngorongoro Conservation Area border.

• Grumeti River crossings occur in the western corridor from late May through July, while Mara River crossings in the northern Serengeti peak from late July through October.

• The herds spend December through March in southern Tanzania, April through June moving northwest, and July through October in the northern Serengeti and Maasai Mara.

• Migration timing varies by 2-4 weeks annually depending on when the short and long rains arrive, making flexible safari dates and mobile camps advantageous.

• Prime Tanzania migration safaris cost $600-$1,200 per person per night in high season (June-October and late January-February), with mobile camps tracking the herds month by month.

The Great Migration's annual cycle through Tanzania

The Great Migration moves through Tanzania for approximately nine months of the year, following a predictable but variable clockwise route and an excellent option for a Tanzania Africa Honeymoon.

The herds depart Tanzania's northern Serengeti for Kenya's Maasai Mara around August and return to Tanzania's northern reaches in October, then continue their southward journey through the central and southern Serengeti from November through December.

This movement is triggered by the search for fresh grazing and water, with wildebeest and zebra following the rainfall patterns that dictate grass growth across the Serengeti-Mara ecosystem.

The migration is a continuous cycle, not an event with fixed start and end dates. Roughly 1.5 million wildebeest travel alongside 250,000 zebra and 400,000 Thomson's gazelle, covering around 1,800 miles annually.

Zebra lead the column, grazing on tall grasses, followed by wildebeest that prefer shorter, more nutritious shoots, and finally gazelle that crop the lowest vegetation. This succession allows the ecosystem to support all three species without depleting the grasslands.

How predictable is the migration's timing each year?

Migration timing shifts by 2-4 weeks annually depending on rainfall patterns. The short rains (November-December) and long rains (March-May) dictate when fresh grass appears, which determines when the herds move into each region.

Drought years compress the cycle, while heavy rains can delay river crossings or spread herds across wider areas.

Mobile safari camps track the herds in real time, repositioning every 6-8 weeks to maintain proximity. Booking with a specialist operator that monitors herd movements daily and adjusts itineraries accordingly is the most reliable approach for witnessing specific migration phases.

December to March: Calving season in the southern Serengeti

From December through March, the migration concentrates in Tanzania's southern Serengeti plains and the Ngorongoro Conservation Area, particularly around Ndutu, Kusini, and the Salei Plains.

The herds arrive in late November or early December as the short rains green the volcanic soils, which produce highly nutritious short-grass plains ideal for pregnant females. Calving peaks from late January through February, when approximately 8,000 wildebeest calves are born daily across a concentrated 2-3 week window.

This synchronised birthing overwhelms predators with sheer numbers, giving individual calves better odds of survival. Lions, cheetahs, leopards, and hyenas converge on calving grounds, creating exceptional predator-viewing opportunities.

Newborn wildebeest can stand within minutes and run within hours, but the vulnerable first weeks produce intense predation. Cheetahs particularly thrive during calving season, and the southern plains offer open sightlines for witnessing hunts across short-grass savannahs.

The Ndutu region sits on the border between the southern Serengeti and Ngorongoro Conservation Area. Several seasonal mobile camps operate here from December through March, positioning close to the herds.

This period offers excellent game viewing with fewer vehicles than the northern Serengeti river crossings, making it a strong choice for photographers and travellers seeking less crowded experiences. Afternoons can bring dramatic thunderstorms as the long rains build, adding atmospheric backdrops to wildlife photography.

April to June: The journey northwest

In April and May, the herds begin their northwest migration toward the western corridor as the southern plains dry out. The timing depends on when the long rains arrive: heavy rains in April can keep herds south longer, while dry conditions push them west earlier.

By late May and into June, the migration typically reaches the western corridor, where the Grumeti River creates the first major water obstacle.

Grumeti River crossings occur from late May through July, though they lack the drama and frequency of the later Mara River crossings.

The Grumeti is narrower with fewer crossing points, and herds often cross in smaller groups over extended periods rather than in the massed crossings seen further north.

Large Grumeti crocodiles, some exceeding 5 metres, wait in pools for crossing wildebeest. The western corridor also supports resident wildlife, including large elephant herds and the hippo pools near Kirawira and Grumeti Serena.

This transitional period from April through early June represents the Serengeti's green season, with fewer lodges operating and reduced tourist numbers.

Some mobile camps close or relocate, and certain roads become impassable after heavy rains. However, travellers willing to navigate occasional logistical challenges encounter dramatic landscapes, newborn predator cubs, and excellent birding as Palearctic migrants overlap with resident species.

Rates drop 20-40% compared to high season, offering value for flexible travellers.

Is the western corridor worth visiting during migration?

The western corridor from late May through July offers a quieter alternative to the northern Serengeti, with smaller crowds and lower rates while still positioning you near migrating herds.

Grumeti crossings occur less predictably than Mara crossings, so this phase suits travellers prioritising overall Serengeti game viewing over witnessing a specific crossing. Permanent lodges like Singita Grumeti and Sabora Plains Camp provide luxury bases, while mobile camps such as Ubuntu and Olakira reposition to track herd movements through June and early July.

July to October: River crossings in the northern Serengeti

From July through October, the migration reaches the northern Serengeti, where the Mara River creates the most dramatic and photographed wildlife spectacle on the continent.

Crossings peak from late July through September, with herds massing on riverbanks before plunging into crocodile-filled waters.

The Mara River features steep banks and fast currents, creating chaotic, high-stakes crossings where wildebeest sometimes drown or are taken by Nile crocodiles measuring up to 5 metres.

Crossings are unpredictable. Herds may gather for hours or days before one animal triggers a stampede into the water. They cross at multiple points along the Mara, with Kogatende in Tanzania's far northern Serengeti offering prime access.

From August through October, a portion of the migration moves into Kenya's Maasai Mara, but substantial numbers remain in Tanzania's northern reaches throughout this period, particularly around Kogatende, Lamai, and the Bologonja region.

This peak season brings the highest visitor numbers and lodge rates in the Serengeti. Expect $800-$1,200 per person per night at prime northern Serengeti camps during July-October. Vehicle congestion around popular crossing points can be intense, with 20-30 safari vehicles sometimes gathering at known sites.

Booking with operators who know alternative crossing points and prioritise early starts significantly improves your experience. Mobile camps like Serengeti Safari Camp and Kimondo reposition to the northern Serengeti from July through October, offering proximity to crossings with more flexible viewing schedules than permanent lodges.

What are your chances of seeing a Mara River crossing?

Your odds of witnessing a Mara River crossing improve with longer stays in the northern Serengeti. A 3-night stay during peak season (late July-September) gives approximately 60-70% probability of seeing at least one crossing, while 4-5 nights raises odds above 80%.

Crossings happen in the early morning or late afternoon, so multiple full days with morning and afternoon game drives maximise chances.

No operator can guarantee a crossing, and you may witness multiple crossings in one day or none across several days. Accept this uncertainty, enjoy exceptional general game viewing in the northern Serengeti, and treat any crossing as a bonus.

November: The return south

In November, the herds begin their return journey from the Maasai Mara and northern Serengeti back toward central and southern Tanzania. The short rains green the plains, triggering the southward migration.

This transitional month sees herds scattered across the central and eastern Serengeti, often around Seronera and the Lobo region. Game viewing remains excellent, with predators actively hunting as herds pass through, but the migration lacks the concentrated drama of calving season or river crossings.

November falls into shoulder season, with variable weather as the short rains arrive. Some days bring afternoon showers, while others remain clear.

Lodges offer reduced rates compared to the July-October peak, and vehicle numbers drop significantly. Travellers seeking value and lower crowds while still accessing migration viewing find November attractive, though you sacrifice the guaranteed spectacle of calving or crossings for more dispersed herds and less predictable sightings.

Where to stay during Tanzania's Great Migration

Accommodation strategy depends on which migration phase you target. For calving season (December-March), base yourself in seasonal mobile camps at Ndutu or on the southern Serengeti plains, which operate specifically during these months and dismantle when herds move north.

Options include Olakira Migration Camp, Ubuntu Migration Camp, and &Beyond Serengeti Under Canvas. These camps reposition to the northern Serengeti from July through October, tracking the herds throughout the year.

For Mara River crossings (July-October), choose camps in the far northern Serengeti near Kogatende: Sayari Camp, Lamai Serengeti, Serengeti Safari Camp, and Ubuntu's northern position.

Singita Mara River Tented Camp offers ultra-luxury with direct river views. Permanent lodges such as these maintain fixed locations, so confirm herd proximity before booking. Some travellers prefer mobile camps that guarantee flexibility, moving if herds shift unexpectedly.

Central Serengeti lodges around Seronera (Four Seasons Safari Lodge, Dunia Camp, Serengeti Sopa) provide year-round resident game viewing but only intercept migration herds during transitional months (April-May, November). They suit multi-park itineraries where the Serengeti is one component rather than the sole focus.

Western corridor lodges like Singita Sasakwa and Kirawira Serengeti Camp position well for June-July but sit distant from calving grounds and northern crossings.

Planning your Tanzania migration safari

Select your target experience first: calving drama with predators and newborns (January-February), Grumeti crossings in quieter settings (June-July), or iconic Mara River crossings with peak drama and crowds (August-September). Book 9-12 months ahead for July-September peak season, as northern Serengeti camps sell out by January for the following summer.

Calving season requires 6-8 months lead time. Shoulder months (April-June, November) offer 3-4 month booking windows.

Allocate 4-5 nights in the Serengeti to account for migration unpredictability and maximise crossing chances if targeting July-October. Combine the Serengeti with Ngorongoro Crater (2 nights) and Tarangire (2 nights) for a comprehensive northern circuit covering diverse ecosystems. Flying between parks via scheduled light aircraft saves time and avoids long road transfers: Arusha to Serengeti takes 6-8 hours by road but only 90 minutes by air.

Budget $600-$1,200 per person per night for quality mid-range to luxury Serengeti camps during high season, including accommodation, meals, game drives, and park fees. Ultra-luxury options like Singita exceed $2,000 per person per night. Add $200-400 for internal flights and $50 per person for Serengeti park entry fees (paid daily). Total costs for a 7-night northern Tanzania safari range from $6,000 to $15,000 per person depending on season and lodge category.