Ear plugs, like Doc's Pro Plugs, help a lot with cold water swimming too. Thick coat of vaseline on hands and feet. Calories just before the start will also help keep you warm. If you're not used to swimming in 50 degree water temps, you might want to consider setting up a conditioning schedule.

Much of how you will feel in the water that day will depend on air temps and wind, and how ell conditioned you are.

Is this just a swim race or a tri? How long is the swim?

---

No coasting in running and no crying in baseball