A wind guiding apparatus (10, 40, 50, 60), comprising: a) an air-cooled condenser arranged as a rectangular array with a length longer than a width, the ACC comprising: i. a condenser tube section having a plurality of widthwise spaced and lengthwise extending condenser tubes and installed at a distance above an underlying ground surface; and ii. a plurality of widthwise and lengthwise spaced fans (6, 26A-C) installed above said condenser tube section, to cause a flow of air from below the air-cooled condenser through said condenser tube section along a fan-drawn air flow streamline flowing to a corresponding one of said fans; and b) a plurality of support structures (13, 15A-C, 18A-C, 27A-C) supporting the air-cooled condenser from below and above the underlying ground surface; and c) one or more stationary wind guiding vanes (22, 23, 42, 43, 51-55, 61-65) located below the plurality of condenser tubes, each of said wind guiding vanes is inclined with respect to the underlying ground surface, such that a downstream edge of the wind guiding vane is located at a greater height than a corresponding upstream edge thereof and is pointing towards a second widthwise end of the air-cooled condenser and away from a first widthwise end thereof, and is connected to, and immobilized by, at least some of said support structures (13, 15A-C, 18A-C, 27A-C), characterized in that each of said wind guiding vanes (22, 23, 42, 43, 51-55, 61-65) is fixed in place below the first widthwise end of the ACC and is capable to redirect air flow from fairly horizontal inflow that is perpendicular to the length of the ACC towards a portion of said plurality of condenser tubes and at least one of said fans (6, 26A-C) at such an angle that deviates from perpendicular, fairly horizontal inflow. a) an air-cooled condenser arranged as a rectangular array with a length longer than a width, the ACC comprising: i. a condenser tube section having a plurality of widthwise spaced and lengthwise extending condenser tubes and installed at a distance above an underlying ground surface; and ii. a plurality of widthwise and lengthwise spaced fans (6, 26A-C) installed above said condenser tube section, to cause a flow of air from below the air-cooled condenser through said condenser tube section along a fan-drawn air flow streamline flowing to a corresponding one of said fans; and i. a condenser tube section having a plurality of widthwise spaced and lengthwise extending condenser tubes and installed at a distance above an underlying ground surface; and ii. a plurality of widthwise and lengthwise spaced fans (6, 26A-C) installed above said condenser tube section, to cause a flow of air from below the air-cooled condenser through said condenser tube section along a fan-drawn air flow streamline flowing to a corresponding one of said fans; and b) a plurality of support structures (13, 15A-C, 18A-C, 27A-C) supporting the air-cooled condenser from below and above the underlying ground surface; and c) one or more stationary wind guiding vanes (22, 23, 42, 43, 51-55, 61-65) located below the plurality of condenser tubes, each of said wind guiding vanes is inclined with respect to the underlying ground surface, such that a downstream edge of the wind guiding vane is located at a greater height than a corresponding upstream edge thereof and is pointing towards a second widthwise end of the air-cooled condenser and away from a first widthwise end thereof, and is connected to, and immobilized by, at least some of said support structures (13, 15A-C, 18A-C, 27A-C), characterized in that each of said wind guiding vanes (22, 23, 42, 43, 51-55, 61-65) is fixed in place below the first widthwise end of the ACC and is capable to redirect air flow from fairly horizontal inflow that is perpendicular to the length of the ACC towards a portion of said plurality of condenser tubes and at least one of said fans (6, 26A-C) at such an angle that deviates from perpendicular, fairly horizontal inflow.