Abstract: A shower curtain assembly having a vertically moveable flexible water barrier is disclosed wherein the water barrier is extendable from and retractable into a support assembly traversing an upper portion of a shower enclosure opening. Additionally, the support assembly is pivotally retractable to a vertical position adjacent a wall of the shower enclosure. Thus, in the retracted configuration, the shower enclosure opening is left unencumbered by the support assembly and the water barrier, and in an extended configuration wherein the support assembly is supported across the upper portion of the shower enclosure opening, the flexible water barrier can be extended downward to form a barrier to water escaping from the shower enclosure.