I was at Newport Coast Villas this past November, and I found a slightly different situation at the main pool complex. As has been mentioned, there are three beautiful pools located together behind the registration building.
Of these, the main pool was too cold for me. There were a few people swimming in it...and I tried it...but it was not pleasant. The other two pools are located on a slightly lower (down hill) level. Of these, one was absolutely freezing cold. Virtually no one was in this pool. The other, which is the adult and/or quiet pool, was nicely heated. It's where I spent most of my swimming time. (Don't assume that both of the lower pools are the same temperature. They definitely are not. One was ice cold and the other was well-heated and warm.)
Have fun! NCV is a great resort.
Steve