Legal Question in Personal Injury in Ohio

Are parents coming along with each guest? I am assuming not. To answer your question, yes, you could be held liable if one of your guests is injured at the beach.

The legal theory is 'negligent supervision.' When you invite someone to your home, you owe them a duty of ordinary care. In this example, you would meet your obligations under the law if you were able to keep the children under reasonable supervision. However, you are admitting that, despite inviting these people to your (rented) home, you cannot possibly monitor all the children AND you know that the ocean can be dangerous. Therefore, you would have breached your duty of ordinary care, leaving you liable for an injury.