Wet soil is rare in Antarctica’s cold deserts, but where snow and ice melt during summer, water can dampen soils, leading to sediment breakdown, chemical changes to the soil, and growth of soil organic matter. It’s still not clear how much water is in Antarctic soils, where it’s located in meltwater features, how the water moves through the thawed soils, or whether it can always be detected using remote sensing. Here, we use sensors mounted on drones to map soil wetting using three sensors, a color camera, a hyperspectral camera, and a microwave sensor. We find that the underground streams called water tracks grow and expand over the course of the summer, becoming wider and wetter. Soils are wetter in the middle of the water tracks and dry towards the edge. This pattern is present both in the soils right at the surface which the cameras can measure, as well as in deeper soils (5-10 cm down) whcih the microwave sensor can measure. Our results suggests that water tracks are wetlands that change over the course of the Antarctic summer, shaping conditions in which soil organisms can grown and build up organic matter.