Stellenbosch and wine tasting: Look at cellars like Tokara, Nederburg (closed on Sundays) and Bellingham. Have lunch at Cafe Art with Lizelle and Peter (they are hunter friendly) in Stellenbosch.
Visit the Language Monument in Paarl. Simons Town with lunch on the harbor - visit the Navy Museum. If you feel like swimming without any clothes on, Sandy Bay but I believe the water is rather cold though
A helicopter flight over the fair Cape (weather permitting) is to be recommended.
The scenery at the town of Franschoek is breathtaking.
Shark cage diving if you want.
Victoria and Albert Waterfront for dinners.