I dive in monterey, Calif. the water surfice temp 47dig. about 60ft to 70 ft dowen the temp drops to 44dig . Yes I dive in A wet suit all of the time. this is what I wear, 7mm wet suit brand Oceanic, lycra suit under brand Henderson, Hood vest 6/4mm Oceanic, gloves 6.5mm Henderson gold core, boots 7mm Henderson gold core, I am warm . There are som thicker wet suits out there like 8mm & 9mm . the outher thing is what is comfert to you. hope this helps any other Quistons let me know Tony