Sirius Diver
Contributor
I dove wet (Henderson 7/5mm 1 piece) on 24 Feb in Lake Simcoe, Ontario during an ice course. It was a balmy -1C / 30F according to my Suunto Cobra. Air temp was at least -10C and the surface time was brutal. I was comfortable for about 20 mins. I will be getting a drysuit for next winter though....