The ban -- which comes into place on January 1, 2014 -- will see smoking on balconies extinguished throughout the 21-strong fleet. Anyone found violating the ban will be fined $250. Smoking was already banned inside all staterooms.
Smoking onboard Royal Caribbean ships is also banned in all public areas except for the Casino, the Connoisseur Club on select ships and on the starboard side of all ships' outer decks.
The move follows that of a number of cruise lines, most recently Cunard and Seabourn, who tightened their policies last month; P&O Cruises and Disney Cruise Line, which which also announced a ban last month.
Of the larger lines, just Carnival and Norwegian Cruise Line allow smoking on balconies.
A statement on Royal Caribbean's Web site reads: “After careful consideration and review of guest feedback, Royal Caribbean International has adjusted its smoking policy on its fleet of 21 ships. Effective January 1, 2014, all indoor public spaces will be smoke-free on all ships with the exception of those sailing in Asia. Smoking will not be permitted in any interior space, including but not limited to restaurants, theater, bars, lounges, corridors, elevators, staterooms and stateroom balconies."
-- by Adam Coulter, U.K. Editor