While there aren’t any laws prohibiting you from swimming in Loch Ness, it’s generally not advisable.  Not only does the water not warm up in the summer months (on the contrary, it says about 5 degrees Celsius all year long), but it is also one of the deepest freshwater bodies in the UK too. Oh, and there may or may not be a prehistoric mythical beast lurking below the surface! Fear not though, there are so many beautiful, safe, and monster-free lochs in Scotland to enjoy a wild swim in.