When I went to South Africa I chose to take anti-malarials even though I was there in August when the risk was low. It's better to avoid getting malaria than to try to get rid of it later.
I would caution anyone to resist the commonly prescribed drug "Lariam"... there are significant reports of psychological reactions including a risk of suicide with its use.
There is an excellent alternative, Malarone, which does not have the same controversy about side effects. You need to take one pill a day, as opposed to one pill a week with Lariam, but that was a small price to pay for me for peace of mind.
If you put "Larium" into google, you'll be inundated with sources on the controversy.
Hope you have a great trip!