Surf School is without question one of the worst movies I've ever had the misfortune to watch. It's dull, predictable, poorly conceived and painfully unfunny. The characters are paper thin and the plot lurches awkwardly from one yawn-inducing scene to the next. There is not a single original or entertaining moment in the entire 85 or so minutes. This film tries to position itself as a comedy in the vein of American Pie but whilst that movie (and it's first sequel) succeeded at being both entertaining and engaging Surf School fails spectacularly on both counts.
This movie should not be watched by anyone ever.
As a side note I find it interesting that the people who have left comments raving about how great this movie is have never commented on any other films. Draw from that your own conclusions.