The Masai Mara is good year-round but the timing determines what you see. The park never closes and wildlife is present throughout the year.
July to October is the high season, driven by the Great Migration. The Mara River crossings happen during this period — unpredictable from day to day, but almost certain over the course of a week's stay. July and August are peak months with the most vehicles and the highest prices. The dry season ensures excellent visibility and wildlife concentrates near water.
January and February are excellent for big cat sightings: the grass is shorter after the short rains, predators are more visible, and the crowds are smaller. This is one of the Mara's best-kept secrets for lion, cheetah, and leopard.
March to May is the long rain season. Roads can become impassable, some camps close, and the grass is long, making game viewing harder. Prices drop significantly, and the few visitors who do come often report exceptional experiences. The park is green and atmospheric.
November and December are the short rains — brief and light, with good wildlife and far fewer vehicles than peak season. One of the better compromises between quality and crowds.
The Mara's version of the migration differs from the Serengeti: animals are present from July through October rather than briefly in a single crossing event. Plan for at least three nights to maximise your chances of a river crossing.