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July to October is the best time to visit the Masai Mara, because that is when the wildebeest are actually here. December to March is the value alternative, dry and quiet with excellent resident game.
The herds are in the Mara for about three months a year. They arrive from late July, stay through October, then move south into Tanzania. The famous calving is a Serengeti event and never happens in Kenya.
Long rains March to May, short rains November to December. April and May are the hardest going: the black-cotton tracks turn greasy and some camps close.
The Mara sits between 1,500 and 2,180 metres, so dawn is cold. A June or July game drive at six in the morning in an open vehicle is about 12°C. Bring a proper jacket, whatever the month.
| Month | High/Low (°C) | Rain |
|---|---|---|
| January | 25°/ 15° | 22 days |
| February | 27°/ 14° | 22 days |
| March | 26°/ 15° | 29 days |
| April | 26°/ 15° | 24 days |
| May | 27°/ 15° | 22 days |
| June | 24°/ 15° | 27 days |
| July | 25°/ 14° | 11 days |
| August | 27°/ 15° | 10 days |
| September | 27°/ 15° | 11 days |
| October | 28°/ 15° | 11 days |
| November | 27°/ 15° | 19 days |
| December | 24°/ 15° | 29 days |
July to October is dry, cool and the best game viewing of the year. Days run about 20°C to 25°C, mornings are cold, and the grass is short enough to see through.
This is also the most expensive and most booked stretch in Kenya. For August and September, book close to a year ahead; the good camps inside the reserve go first.
Late July to October is the only window the wildebeest are in the Mara. The Mara River crossings, the ones in the photographs, are typically late July and August as the herds come in, and again in October and November as they go back.
The calving season is not here. Around half a million calves are born in two to three weeks in the southern Serengeti, in Tanzania, peaking in February. If that is what you want to see, you need a Tanzania itinerary, not a Kenyan one.
January to March is dry, warm and much quieter. Days reach about 25°C to 30°C and the short rains have finished, so the grass has thinned again.
Guides call it lion season: with less cover and fewer vehicles, the resident prides are easier to find and follow. No migration, considerably lower rates, and the best big-cat photography of the year.
November and December bring showers rather than sustained rain, about four weeks of it, and game drives keep running.
The last of the migration heads south through November, so you can still catch herds with far smaller crowds. Migratory birds arrive, and rates drop until the Christmas fortnight.
April and May are the wettest six to eight weeks of the year and the one stretch to avoid for a first safari. April is the wettest month across the region.
The Mara's black-cotton soil turns greasy, tracks are hard going and a number of camps close or discount steeply. Grass grows tall and hides the animals. Birding is superb and prices are the lowest of the year.
Balloons launch before sunrise and fly year-round, wind permitting. Book yours for the first morning of your stay so you have a day spare if it is called off.
Dress for cold. At 1,500 to 2,180 metres a dawn game drive or balloon basket in June to August sits near 12°C in moving air, and it warms to 25°C by mid-morning. Layers, not a single jacket.