Dive without getting wet! Learn how to manage a dry suit. This is a must if you plan on doing any ice diving. Many people prefer using a dry suit even in a warm environment. Remember, the water temperature in a freshwater lake below the thermocline can get very cold - even in the middle of summer. You must wear some type of protection - either a wet suit or a dry suit. Many divers prefer a dry suit because it is usually less restricting than a wet suit.