when will the apple watch be available in South Africa ?

Hi

Beyond what Apple has announced publicly, I'm afraid that no-one here can tell you anything about Apple's plans (this is a user-based technical support community). Also, the Community rules do not allow anyone to speculate / guess here about them either.

You can monitor this page for press releases:

https://www.apple.com/pr/library/

And also the Apple website for South Africa:

http://www.apple.com/za/