Hydro-Man possesses the ability to bodily transform himself, in whole or in part, into a watery liquid substance of unknown composition. While in this state, his consciousness can control every droplet that comprises his body.

Thus he can will himself to turn liquid whenever struck. (Presumably if he were to will just his torso liquid, his still solid head and arms would fall to the ground. It is not known if this would cause injury to his solid parts or not. The Hydro-Man can also propel the liquid particles of his body at great pressure in the same style as water shooting through a fire hose. It is not known how he generates the pressure to create this effect. Also he can harden his fist as if it were ice hard.