Yes, wetsuits can be worn for a variety of water activities beyond just surfing, including diving and swimming. Wetsuits are designed to keep the wearer warm in cold water by trapping a layer of water between the suit and the skin, which is then warmed by the body’s natural heat.
It’s important to choose the right type of wetsuit for the specific water activity you’ll be doing and the water temperature you’ll be in. Using a wetsuit that is too thick or too thin for the conditions can result in discomfort or even hypothermia.