This Feb, Jan 24-Feb9th, I used my 3m full suit Hyperflex Mojo, it was perfect for me. On a few days, I wore a 2 mill neopreme rash quard under it. I saw people with just shorts and a windguard. I figured they must not be spending too much time on the water. I have kept trip notes for the past 10 years, In Nov, I can get away with a Shorty or board shorts. I tend to get cold after 2-3 hours of kiting so err on the warm side. The weather can be chilly, so I would bring at least a 3mm full suit or short sleeve. Last Jan I took my 3/4/5 suit and that was fine. I haven't been in March too much, you might get away with a shorty. I find it can be surprsingly cold in La Ventana.
Have a good trip.