Yes, Carnival Cruise Line has a strictly enforced curfew for all guests aged 17 and under. In 2026, the policy mandates that all minors must be out of public areas by 1:00 AM unless they are accompanied by an adult aged 21 or older or are participating in a supervised "Circle C" or "Club O2" youth activity. Carnival has significantly "cracked down" on this rule to prevent late-night disruptions and ensure a safer environment for all passengers. The consequences for violating this curfew are severe: a first offense typically results in a formal warning, while a second offense can lead to a $500 fine. If a minor is caught out after curfew a third time, the entire traveling party can be disembarked at the next port and permanently added to Carnival's "no-sail" list. This policy ensures that the "Fun Ships" remain enjoyable for everyone, preventing the late-night unsupervised roaming that has historically led to noise complaints in the residential corridors and lounge areas.