Jolteon stretched once upon entering the hot springs, carrying the plain yukata over his shoulder (because to be honest, it just wasn't his style) and holding the towel to his waist. After a moment of looking around, he selected an empty-ish spot and dropped the cotton robe, then sunk slowly into the water, hissing as the heat stung at his flesh.
It may or may not be a good idea for an electric type to be in water.