Drive on the left hand side of the road!! And don’t park on the opposite side of the road.
Table Mountain
If there is no cloud on the table top, take advantage of it to go up. It can be perfect weather and still have “the table cloth” on it.
Also, please don’t go hiking in bad weather! Stick to well known routes.
Summer Sun
In summer, use a SPF of 25 or higher. This is not the European sun. It bites back.
Crime
Stay aware and awake. You can go around Cape Town quite safely but, like all cities, there are criminal elements. They are minor here but as a precaution, stay where it is well lit and around people.
Drive with locked doors at night. Try and plan trips so that you know where you are going.
Don’t leave things on the beach when swimming. Ask a nice decent looking couple to keep an eye on it if need be.