papaflamingo, I assume you are referring to the first couple of days out and the last couple of days back when you say, "Kinda cold." I've been going to the Mexican Riviera since before it was called that, and I have NEVER been there when I would call it kinda cold . . .or even cool. Once you get past the tip of Baja there are only three temperatures: hot, hotter and hottest :-)
Valeries220, I encourage you to see the Pacific Coast of Mexico. As papaflamingo says, it is a different kind of Mexico, but well worth exploring. The big difference is the water; it is not as clear and warm as the Caribbean, so if you go for the snorkling or scuba, you may be a little disappointed. But the beaches are absolutely beautiful and the other water sports are great.