Maringma-tepui has a maximum elevation of around or . The summit plateau has an area of roughly and is highly uneven, allowing water to collect in many deep, swamp-like pools. It is predominantly covered in low-growing tepui meadow vegetation, quaking peat bog, and some dwarf forests of Bonnetia roraimae, with few areas of exposed rock. The dominant plant families include Bonnetiaceae, Bromeliaceae, Clusiaceae, Orchidaceae, Rapateaceae, Sarraceniaceae, and Xyridaceae. Temperatures vary widely on the summit plateau, with extremes of 13.5 and 37.5 °C recorded over a five-day period.