The spring southeaster is Cape Town’s harbinger of happiness, for it signifies that summer is finally here. From a diving perspective, it is fulfils another useful function: the wind is directly offshore and blows the dirty surface layer away. This is replaced by the ice-cold, crystal-clear water from the deep in a process known as “upwelling”. This nutrient-rich water is welcomed by the bait fish shoals, which are pursued by dolphins, snoek and game fish such as yellowtail.
Following several days of a pumping southeaster, the water on Cape Town’s Atlantic Seaboard on Saturday, October 31 was about as good as it gets – 20m underwater visibility and a chilly 10°C.