sasscuba
Contributor
ggunn:Everyone is different when it comes to thermal stuff. In the warmer months I dive Cozumel in a shorty and I am comfortable even when we dive three tanks, and I use a 3mm full with a beanie in the winter. My wife doesn't use a wetsuit there even in January. The water temp last January was a pretty consistent 79F, and in May it was five or six degrees warmer.
That's true..I dive in a t-shirt and bathing suit all year long in Cozumel no matter when we go.