Well honestly your workout is going to have a lot less to do with weight loss than your diet and cardio sessions, but try working in the 15-20 rep range, doing the same number of sets, lowering your weights by around 25-30%, and doing your reps in a more explosive fashion. That should keep your heart rate a little bit higher during your workouts and burn more fat for you, fatty.

The most important thing for you is to eat clean, drink plenty of water, and up your cardio work by a little bit. Also, not drinking alcohol between now and when you want to go to the beach is pretty necessary.