If Easter falls in April, Namibia can be relatively busy, as this is a relatively popular place for families in the Easter holidays. If you can avoid the Easter rush, this is one of our favourite times to travel; good prices, few tourists, stunning vistas, and good wildlife (although as mentioned, the wildlife is not at its peak here).
April is also a time to get to the Skeleton Coast, so if you are looking to cover a vast majority of Namibia in one safari, this can be the best time.
Note that days can see shorter in April due to Daylight Savings Time; the sun will set at about 5.30pm. April is also cooler compared to January to March, with a daily average of 26 degrees centigrade, and night time temperatures averaging at just 13 degrees.