Camboinhas is a long beach which makes it hard to say where is going to be breaking better for skimboarding. The waves can have a great shape but a not so big size with a east swell and are going to be bigger and a bit choppier if the swell is coming from south. If the swell is really small it's a risky option because it might be flat. The access to Camboinhas Beach is pretty easy as well, after following the signs to the ocean region just follow the signs to Camboinhas.
(photo: Google Earth)