Carnival Cruise Line has quietly turned one of its West Coast ships into a playground for grown-ups. The Carnival Firenze is in the middle of a run of adults-only sailings under the line's SEA Cruises programme, and the clue to who these trips are really for is in the extras: gaming. Passengers must be 21 or over, and the ship has temporarily gained a third casino to keep them busy.
The format is simple. Four SEA Cruises are running through late November, all departing roundtrip from Long Beach, California, with itineraries of seven to 14 nights. The first left in mid-October for Cabo San Lucas, Mazatlán and Ensenada. Next up is a longer 14-night sailing to the quieter corners of the Mexican Riviera — Acapulco and Manzanillo — before calls at Puerto Vallarta, La Paz, Cabo San Lucas and Ensenada on the way home. Two more sailings follow in November, an 11-night and a seven-night, both around the region.
The gambling set-up is the main draw. The Firenze normally carries two casino areas — a smoker-friendly main floor and a smaller non-smoking space — but for these cruises Carnival has added a third, smoke-free casino in the ship's Tuscan Lounge. It is a temporary fit: the space reverts once the casino series wraps up. Dining has also been upgraded for the sailings, with special menus that reportedly offer more choice and premium options than the standard shipboard line-up.
The Firenze itself has an interesting backstory. Built in 2021 for Costa Cruises, the 4,232-passenger ship transferred to Carnival and now sails the West Coast. Once the adults-only series ends in late November, it returns to its usual schedule of short Baja and California cruises. Then things change more dramatically: in early 2027 the ship repositions via South America — Ecuador, Peru, Chile, Argentina, Uruguay and Brazil — marking Carnival's return to that continent, before settling into new homeports in Miami and New York City with a broader mix of itineraries.
Why it matters: if you want a cruise with no kids on board and you enjoy time at the tables, this is a rare mainstream option on the West Coast, and the window is short — the last sailing is in November. The 14-night Acapulco and Manzanillo itinerary is the standout for travellers who have already done the standard Cabo-and-Puerto Vallarta loop. If you miss it, keep an eye on the ship's 2027 East Coast move, which opens up a very different route map.
