Yvonne,
Although I've not been to Sun City I've been to South Africa quite a few times post-Apartheid and it always seems to be in the 70's but breezy on the coast. I believe that a lot of the hotels at Sun City are run by the Sun International chain who I've had discounts before in other countries ( see <a href="http://www.sun-international.co.za" target="_blank">http://www.sun-international.co.za</A> ). Also RCI look after a lot of the properties in Sun City and you'll also see the occasional deal on the SA version of ebay ..www.bidorbuy.co.za.
For reference a useful search engine for SA is www.ananzi.co.za.