June, July and August
Go nowStrong flow, clear views, comfortable weather
The flood is receding but the volume is still large, so the falls are impressive and you can actually see them. Dry, sunny days and cool nights, both sides fully watered, and the game viewing improving as the bush dries. The best all-round window and priced as peak season.
September
Go nowFalling water, rising heat, and the pool opening
The rock structure becomes visible, the Zambian side thins, and the Devil's Pool becomes reliable. Excellent for game viewing as animals concentrate on the river. Hot and getting hotter, but the clearest photographs of the year come from this month.
April and May
Worth it, butMaximum volume, and you will not see much
The annual peak. Spray rises hundreds of metres and the roar is audible far away, which is genuinely extraordinary — and from most viewpoints the waterfall itself is invisible behind its own mist. You will be soaked through and so will your camera. Rafting and the Devil's Pool are closed.
October
Worth it, butThe clearest views and the worst heat
Low water, exposed rock and the best light of the year, with the Devil's Pool open. It is also the hottest month by some margin and can be uncomfortable in the middle of the day. Zambia's side may be reduced to a trickle.
November
Worth it, butThe first rains, and the lowest prices
Afternoon storms begin, the heat breaks a little and the bush turns green. The falls are still low, so this is a cheap month with acceptable conditions. Migratory birds arrive and the game viewing starts to thin.
January, February and March
Think twiceRainy season: hot, wet, and the river not yet full
Humid days with heavy afternoon rain, roads and bush tracks difficult, and the river rising but not yet at its peak. It is the least rewarding combination: neither the clear low-water views nor the full flood. Prices are at their lowest and so is the reason to be here.
December
Think twiceWet, hot and busy over the holidays
The rains are established and the falls are still building, while Christmas and New Year push prices and occupancy up regardless. Green, lush and humid. The one window here where you pay peak rates for off-peak conditions.