How to Save a Surfer in a Hurry

In this scenario, you have a family and you have children. You're going away for a weekend to an isolated beach cabin. Your teenage daughter gets bored on your getaways so makes plans to go swim at the beach. The girls don't pay attention and they run down at the beach and start swimming. What do you do? I will allow you to use your ingenuity. However, I will count the time that it takes you to do things.