This paper describes the performance characteristics of a stepped-slope floating breakwater used for wave protection in small ports and harbours. The test models have been subjected to regular waves in a wave flume to determine their hydraulic performance under various wave conditions. The typical performance characteristics of the breakwater are quantified by the amount of wave transmission, wave reflection and energy dissipation, and are graphically presented with respect to a range of wave parameter. The experimental results showed that the triple-row stepped-slope floating breakwater is a good wave attenuator and an effective energy dissipater. © 2013 IEEE.