do you want in Namibia go on a safari, then it is best to plan your holiday towards the end of the winter period. This is the time when many animals gather at the various waterholes.
Furthermore, the vegetation is still quite arid at this time and everything looks pretty dry. This makes popular Safari hotspots look like the Etosha National Park much more authentic.
Of course you can also go on a safari in Namibia at other times of the year. But the change from winter to spring is a time when you can see a lot of animals.