Blind characters have disadvantage on attack rolls, however breath weapon does not require the attacker to roll dice. Should I assume, then, that there is not penalty for attacking with a breath weapon while my character is blind?
Blindness imposes no mechanical penalty on a creature using a breath weapon.
The blinded condition states:
- A blinded creature can't see and automatically fails any ability check that requires sight.
- Attack rolls against the creature have advantage, and the creature's attack rolls have disadvantage.
Since a breath weapon uses a saving throw by the target, rather than an attack roll by the attacker, there is no “penalty” to using a breath weapon while blinded. However, you must consider that if you can’t see, maybe you aren’t sure where the best place to point your mouth is.