When a boat is docked in the water, it has no protection from waves. Even small waves can have a compounding effect on a boat. They slosh up against it, slowly battering the sides and weakening the hull. Not only that, but the movement of the water can make your boat sway and move around. In turn, there’s a high chance it can knock into the dock or nearby boats. Thus, you run the risk of seeing physical damages when you next check on your boat.
Furthermore, water levels can rise, and waves may cause some water to spill inside your boat. While it’s unlikely that enough water will fall inside to sink your boat, it can deteriorate the deck and other materials. With a boat lift, you secure your boat above the water, preventing the waves from doing any damage. Your boat is securely in place, with no risks of water getting into it or battering against the dock.