Spike over at wavescape had this to say about Derde Steen
Good-quality beach break near Blouberg. Needs glassy to light northeast and two- to five-foot west swell. Gets super-hollow and superlative. Link
Derdesteen picks up a fair bit of swell, has many peaks so even in a high crowd things are manageable. Offshore is South Easterly ish, and it works right through the tide (I’m still not sure if high or low is better, get lucky and both are great!).
Derdesteen Currently has a ship washed up there, and is un-surfable. Read the post here: Ship Washed onto the beach in Cape Town