Beach Party Flicks are all pretty wacky and tend to be all over the place.
We also have a man in a monkey suit running around and making the teenage youth look bad. The monkey can out-surf, out-dance and even beat them in drag races. This of course having something to say about the mental capacity of the teenage beach bums. The retarded biker gang The Rats tries to bring Frankie and his pack down again and we get a big fight scene for a climax which is probably the most entertaining scene in the whole movie.
This one also sports a Boris Karloff cameo and oddly enough the director would go on to do the awesome 80's slasher Night Warning. Now that you should see.