May is the month that separates the safari travelers who do their homework from those who simply follow the crowd. On paper, May is still deep in the long rains: the grass is tall, the roads can be muddy, and the dramatic spectacle of the calving season and the river crossings are both out of reach. In practice, May offers some of the Serengeti’s best-kept secrets: the beginning of the Grumeti River crossings in the western corridor, the final days of truly empty camps before the dry season surge begins, and a landscape in its full wet season glory before the July crowds arrive. For travelers who get timing right, May can be the most rewarding month of the year.
The Western Corridor and Grumeti River
By May, the Great Migration herds have moved through the central Serengeti and are pushing into the western corridor. The Grumeti River, which runs east-west through the western Serengeti before joining the Mara River system further north, creates the first major obstacle on the migration’s northward journey. The Grumeti crossings are less famous than the Mara River crossings of July to October but offer something equally dramatic: the chance to watch wildebeest commit to a wide, murky river patrolled by some of the largest Nile crocodiles in Africa.
The crocodiles of the Grumeti River are genuinely enormous. Some individuals reach over 5 metres in length and are estimated to be 70 to 80 years old. These ancient reptiles have spent their entire lives in the Grumeti, growing fat on the annual flood of wildebeest that passes overhead in May and June. Unlike the Mara River crossings where the crossings happen at a relatively small number of traditional crossing points, the Grumeti crossings can happen at multiple points along the river and require a guide with strong local knowledge to position you correctly. The best western corridor camps have guides who track the herds and the crocodile activity daily.
What Makes May Special Beyond the Grumeti
The Grumeti crossings are the headline event in May, but the entire western corridor offers exceptional wildlife viewing in this month for reasons that go beyond the migration. The woodland and riverine forest of the western zone supports strong populations of species that are less common in the open central Serengeti: topi in large herds, roan antelope (rare and worth celebrating when found), African wild dogs occasionally passing through on their enormous territorial ranges, and an outstanding diversity of forest birds in the riparian vegetation along the Grumeti and its tributaries.
The western Serengeti also has its own character that is distinct from the more famous central and northern zones. The landscape is more varied: rolling hills, dense woodland patches, rocky outcrops, and the winding river create a mosaic of habitats that produces wildlife surprises at every turn. The tourist pressure in the western corridor in May is a fraction of what the central zone sees even in moderate months, meaning that sightings here feel genuinely private and unhurried.
End of the Long Rains
May is the final month of the long rains, and as the month progresses the rainfall typically begins to ease. The first half of May can still see significant rain and associated road challenges, but by the second half of the month the showers become lighter and less frequent. The landscape in late May has the fresh green richness of the peak wet season combined with the beginning of the accessibility that the dry season brings. It is arguably the most beautiful time of year in the Serengeti from a purely aesthetic standpoint: every shade of green is represented, from the almost blue-green of the new grass through the deep forest green of the riverine woodland to the yellow-green of the mature plains grass glowing in afternoon sun.
Wildlife Highlights in May
The central Serengeti around Seronera remains productive for big cats in May. Lion prides are well-fed following months of abundant prey during the migration and calving season. Leopards in the Seronera River woodland are active and visible, particularly in the early morning. Cheetahs on the eastern plains hunt the resident gazelle population and occasional straggler wildebeest. Elephants move in family groups across the western and central zones, taking advantage of the abundant vegetation. The hippo pods in the full Seronera River pools are at their most crowded and noisy of the year.
The bird diversity in May is spectacular. Resident breeding species are active and often in their finest plumage. Palearctic migrants are completing their final weeks in East Africa before the northward departure that typically runs through April and May, so May birding can still catch large numbers of warblers, waders, and raptors that will have left the continent by June. The yellow wagtails that carpet the short grass areas around wildebeest herds are particularly numerous in May before they begin their long northward journey.
Accommodation and Value in May
May offers the best value of any month in the Serengeti safari calendar. Low season rates apply across the board, with discounts of 30% to 50% from peak season prices at equivalent properties. A luxury camp that charges per person per night in August may offer a rate of to in May. A mid-range tented camp that costs in July may be available for in May. These are substantial savings that can allow a significant upgrade in accommodation quality or a longer stay for the same total budget.
Camp selection in May requires more research than in peak season because some properties close for the rainy season. The western corridor has a smaller number of camps than the central zone, but those that operate year-round tend to be the more established and reliable properties. Always confirm operational status when booking a May safari.
Practical Tips for May
Pack for variable weather. May mornings can be clear, warm, and beautiful. May afternoons can bring dramatic storms with heavy rain, lightning, and strong winds. A waterproof layer, waterproof boots, and protection for camera equipment are essential. Vehicle selection matters: ensure your safari vehicle is a proper high-clearance 4×4 with good tyres capable of handling muddy tracks. Avoid any safari operator who runs a fleet of 2-wheel-drive minibuses or vans for western corridor visits in May.
The western corridor camps near the Grumeti River require a charter flight or a longer road transfer than the central Serengeti. From Arusha, the road transfer to the Grumeti area takes 6 to 8 hours. The charter flight from Arusha to Grumeti Airstrip takes about 60 minutes and is well worth the cost if your time is limited.
May Verdict
May is for the traveler who has done enough research to know that the safari calendar is not binary: that the choice is not simply between peak season spectacle and wet season avoidance. May offers a genuinely excellent wildlife experience, outstanding value, the extraordinary drama of the Grumeti crossings, and the satisfaction of experiencing a landscape that most safari visitors never see at its most vivid and alive. The right camps, the right vehicle, and the right attitude toward variable weather: those three ingredients produce a May Serengeti safari that many experienced travelers describe as the most memorable of all their African trips.
