Abstract: A modular decking assembly for defining a floor to stand upon includes a plurality of panels that each has a tongue and a groove. The tongue on each of the panels releasably engages the groove on an adjacent one of the panels. In this way the panels can be coupled together to define a support surface for standing or sitting. Each of the panels is positionable on the ground and each of the panels is comprised of a fluid impermeable material to inhibit people's feet from getting wet during standing. A plurality of pins is provided and each of the pins is extendable through a respective panel and engages an adjacent panel for removably coupling the panels together.