Cabo Raso is easily one of the heaviest waves in the Lisboa Region. Driving north on the Marginal road from Cascais towards Guincho, this spot is located in front of the well known Cabo Raso Lighthouse. There's no sand to walk into this spot and if the swell isn't huge you wont see it breaking. It doesn't break when it's smaller than 4 feet and to get in you'll have to jump from the rocks. A better option would be to go by boat or jet ski from the nearby Cascais Marina.
There is no way to get out from the water except if you climb the rocks, something not advisable to even the highest level surfers, or by boat. Many of the best local surfers often "defy" this spot on big days, using it as a training step to eventually get into surfing bigger waves. It doesn't break often and works best on West, SouthWest and South swells with North, East, NorthEast winds.