The best time to see the Great Migration is from June to October, when the herds move through the Serengeti and cross the Grumeti and Mara Rivers. This period offers dramatic river crossings and predator action. Alternatively, witnessing the calving season from January to February in the southern Serengeti provides an exciting display of newborn animals and predator interactions. https://www.gondwanaecotours.com/travel-journal/whats-the-best-time-of-year-to-visit-tanzania/