What thickness wetsuit do you need for scuba diving?

Answer 1

For UK diving you may still want to vary the thickness of your gear, depending on the water temperature, but for footwear, thicker is better than thinner as it will get a rougher time than most of your suit. I would say 3mm at least.

Answer 2

This depends on many factors mainly the water temperature in which you will be diving in. Warm waters 3mm to 5mm while cold waters you will be requiring thicker wetsuits from 5mm to 7mm. Duration of dive and depth also come into play.