You Do Need power plug adapter while traveling from Canary Islands to South Africa.

Here is Why You Need An Adapter

The outlet and plug type used in South Africa are C, M and N and in Canary Islands are C, E and F. This is how they look like.

Canary Islands

In Canary Islands, outlets of type C, E and F are in use.

Type C

Type E

Type F

South Africa

In South Africa, outlets of type C, M and N are in use.

Type C

Type M

Type N