NOVELTY - The method involves calculating prediction being indicative of amount of kinetic energy available in individual surface wave (10) for realizing conversion into increased potential energy of working fluid (17) during upward stroke of a float (9) by a calculator (11). An energy transmission structure of fluid displacement structures (28, 31) is adjusted for realizing conversion into increased potential energy of the working fluid during upward stroke of the float and based on the calculated prediction being indicative of amount of the kinetic energy available in wave, by a controller (12).    USE - Method for extracting kinetic energy from surface waves of water moving in horizontal wave movement direction along a water surface of water such as sea, ocean and waterway.    ADVANTAGE - The method enables facilitating adjustments of contact surface configuration in an effective manner while tailoring the energy transmission structure to amount of available kinetic energy, which is converted for certain individual surface wave, and continuously providing high efficiency in kinetic energy extraction from surface waves throughout highly varying wave conditions, so that kinetic energy extracted from surface waves of water is automatically maintained. The method enables adjusting of the energy transmission structure of the fluid displacement structure for realizing conversion into increased potential energy of the working fluid during upward stroke of the float and during downward stroke of the float, so as to provide efficient time management.    DETAILED DESCRIPTION - The working fluid is working liquid. An INDEPENDENT CLAIM is also included for a system for extracting kinetic energy from surface waves of water moving in horizontal wave movement direction along a water surface of water.    DESCRIPTION OF DRAWING(S) - The drawing shows a vertical cross-sectional view of a system for extracting kinetic energy from surface waves of water.    Float (9)    Individual surface wave (10)    Calculator (11)    Controller (12)    Working fluid (17)    Fluid displacement structures (28, 31)