Several others who have been injured in the accident are receiving treatment at the regional hospital, Kintampo divisional police commander Desmond Boampong has confirmed to Xinhua.
There are currently different versions of casualties. Another police officer Desmond Oppong Boanu told Xinhua the death toll was 18.
The victims, who are mostly senior high school students, were on an excursion and swimming beneath the fall when a rainstorm accompanied by a strong wind and thunder forced the tree to fall over them.
The Kintampo waterfall is one of the highest waterfalls in Ghana.