Temporary platforms and methods of securing such platforms to an offshore structure include a plurality of clamps secured to an existing portion of the offshore structure at a selected height. A receiver member can be secured to the clamps at a selected horizontal position, and a temporary platform structure can be secured to the receiver member, thereby providing a temporary platform that can be installed, removed, and repositioned, as needed, for a variety of purposes. Such platforms are usable in place of elevating boats and similar vessels, enabling operations to be conducted independent of the depth of the water.