<P> The Constantia Valley is located south of Cape Town on the Cape Peninsula that juts out into the Atlantic Ocean . Because of its location , the region receives oceanic influences on each side that create a cooling effect contributing to a long , slow ripening period in the summer where average daily temperatures fall between 18 -- 19 ° C ( 64 -- 66 ° F ) . Winters are often moderate and mild but wet with annual precipitation usually over 1,000 millimetres ( 39.37 in ) . The soil of the region is composed primarily of Table Mountain sandstone with high concentrations of loam and granite . The area grows a wide range of grapes with Sauvignon blanc being particularly noted . The area is now home to 11 wine farms ( Andrews , 2017 ) . It is the oldest wine - growing region in the country , with the farm Groot Constantia being the oldest wine estate . </P>
this winelands area is known as the birthplace of south africa 's wine industry
The Constantia Valley