Abstract: An adjustable personal sun shelter to overlie a free-standing or integrated sun lounge or deck chair of the kind commonly occupied by a user while sunbathing beside a swimming pool. The adjustable personal sun shelter includes a base and a support structure that suspends a shade canopy in a cantilevered state above an underlying sun lounge at an optimal height to project shade over the sun lounge. The shade canopy is adjustable by a user to vary the amount of sunlight or shade received when occupying the underlying sun lounge. The shade canopy is adjustable by an extendable central member or by two or more parallel extendable side members, to which shade material is fastened. The shade canopy has a moveable leading end and a fixed trailing end. In the operational condition of the sun shelter, the length of the shade canopy can be increased by extending the leading end of the shade canopy relative to the trailing end, or the length can be decreased by retracted the leading end.