DeepSeaExplorer
Contributor
Like stated earlier, the panhandle springs are 68F year round. I understand some of the more southern springs can be around 78F as well. People do teach cave in the panhandle.
I'm not sure I understand your point. That the water in the panhandle may be cooler only makes my point stronger.
As I said, I wear a multi-layer 7mm and near the end of deco after a 70-80 minute dive, I'm getting cold. After that time in the water, a single layer of 5mm would leave me shivering, but that's just me.
The OP didn't give specifics on the type of class. A cavern class may be a different issue since the dives are shorter and there's no deco. However, some instructors like to hang out on the surface to discuss the dive, so the difference could be minimal, especially if doing multiple dives over several days. Being cold just makes cave training more difficult and sucks the fun out of it. It's hard to wear too much suit.