In the afternoon and depending on the season different waterlevel.
In the afternoon the falls shine in a wonderful bright warm light in contrast to the morning where you are faced with backlight and a glaring sunlight. The best time of the year is depending on what you expect to see. The highest flow is from February to May/July . Most of the viewpoints are too misty for a good picture and view but most impressive if viewed from the air. Low water level occurs from August until January. The rainy season last from November to March and it gets quite hot. Therefore our favorite months are August and September usually sunny and dry days. The level of the Zambesi river is still high enough for the falls but not too misty or even dry.
We spent two nights at the Victoria Falls Hotel which is in walking distance to the falls. At some hotels you are dependent on a bus transfer. August and September are also a good time for game viewing. We combined it with the Okavango Delta, Moremi and Chobe.