Yes, "wild swimming" in Scottish lochs is incredibly popular and perfectly legal under Scotland's "Right to Access" laws. Loch Lomond and Loch Ness are two of the most frequent spots for open-water swimmers. However, swimming in a loch requires significant caution due to Cold Water Shock, as even in the height of summer, water temperatures rarely rise above 15°C (59°F). The water can also be deceptively deep, with steep "drop-offs" close to the shore and hidden underwater hazards like submerged trees or thick weeds. Experienced swimmers always wear a brightly colored tow-float for visibility and often a wetsuit to maintain core temperature. While invigorating and culturally significant, swimming in lochs is strictly a "swim at your own risk" activity; beginners are encouraged to join local groups or stick to designated beach areas like those found at Luss on Loch Lomond.