Dear Ned
As I can see from previous replies, they agree with what I am about to
tell you. The weather in Cape Town and along the Garden Route can be
very unpredictable. Even as a local I make sure that I have clothes
for all seasons available.
The weather is generally cooler in May, but is still very pleasent. As
a general piece of advise, bring clothing for all seasons, you will
experiance lots of variation along the route.
Let me know if you need any further advise
I hope you enjoy your holiday.
Tracey
CityGuideSA
http://www.cityguidesa.com/