Short answer: all the time. Long answer: you can start getting breakfast cocktails early, pool bars tend to open around 10:00, the rest open around 11:00 or 12:00. The outside (pool) bars typically close down first, and the inside bars stay open until around 2:00. Of course it depends on the ship and cruise line.

While many travelers assume cruise ships offer 24/7 alcohol service, most bars on a ship do have specific closing times, though at least one venue usually stays open until the "early hours" of the morning. On major lines like Royal Caribbean and MSC, the main pool bars and specialty cocktail lounges typically close between midnight and 2:00 AM once the crowds begin to thin. However, the ship’s nightclub or a designated late-night pub will often remain open until 3:00 AM or 4:00 AM, or until the last guest leaves. In 2026, some of the newest "mega-ships" have introduced "all-night" concepts, such as the Lime and Coconut bar on certain Royal Caribbean vessels, which may offer service nearly around the clock to cater to late-night party-goers. If you find yourself thirsty after all the public bars have closed, most cruise lines still offer 24-hour room service, which can deliver a selection of beer, wine, and spirits directly to your cabin for a small delivery fee, ensuring that you are never truly without an option for a nightcap.