To decide which is the best time to go to the Okavango Delta, two factors must be considered: the alternation of the dry season and the rainy season and the flood of the Okavango Delta.
In Botswana, the rainy season begins in November and December and reaches its peak in the months between January and March; at this time of the year there is little water in the Okavango Delta, the river's flood has almost completely evaporated in the sun in September and October or has been absorbed by soil and plants.
As a result, the animals disperse on its territory, as they are able to find water and food a little everywhere; many move to the mopane forests near the Okavango Delta, others move South to the Central Kalahari and the salty expanses of Makgadikgadi and Nxai, that at this time turn into lakes from the brackish and shallow waters.
In this period there are also many birds that migrate here from Europe to make it through the winter in the heat and to reproduce.
Temperatures are high, but the humidity rate, that in October and November is considered unbearable, begins to decrease and be more bearable, despite the rains continuing to fall until March.
Since April rainfall start to be less frequent and temperatures begin to be mild, in May the rainy season is over and the vegetation begins to yellow, while the flood of the Okavango River, that takes months to reach Botswana, begins to flow in the Northern part of the delta.
In June begins the dry season and the animals start to return to the Okavango Delta because here they have a certain source of food and water, thanks to the flood that fills the permanent channels and invades the alluvial plains, starting from the North-Western part of the Delta, then to the South-East.
Temperatures fall, the days are cool while the nights are cold and, especially in June, they can go under zero; the air is dry and the days are clear and calm.
This is the best time to go to the Okavango Delta, both for classic off-road safaris, and for safaris on a boat or on a mokoro, thanks to the flood, that makes these type of activities possible.
In September the temperatures begin to rise, the level of the Okavango flood begins to drop, due to the excessive evaporation that creates moisture; in October the temperatures are very high, they can exceed 40 degrees, and make the humidity very elevated; the vegetation is yellowed, also near the Okavango Delta, and all, animals and plants, wait for the rains to begin dropping usually in mid-November, bringing life back to the Great Kalahari basin where animals disperse again .