Snakes and Baths

When giving your snake a bath/soak, what temperature are you guys using? Want to give my boa a soak and let her chill in some water, but don't want it too cold or too hot.

I make sure the water temperature is about 80-85 degrees. Use a fish tank temperature gauge, trying to guess by feeling the water is hard as it almost always feels cold because our body temperature is so much higher.