For years the frothing, white-rimmed rollers of Indonesia, Hawaii and Australia have held the crown. But there’s a young pretender storming the royal ranks. Not so long ago the World Travel Market identified Africa, with its world-class waves and uncrowded waters, as 2015’s top affordable surfing destination. South Africa and Morocco have already made it onto the map, but a number of other unexplored areas look set to bubble to the surface.