A small number of dunes have no growing plants and are known as white dunes. The soil-forming processes are very slow on the dunes, and the existing soils are of initial character. Well shaped podsolic soils, which are present in areas overgrown by pine forest, are included into the gleyed podsolic type of soil. There are also fossil relict soils located under the thick cover of dune sand on some areas, and they are remnants of former forests. The soil on the moors is more differentiated, since there are low, transition, and high moors represented in the Park.
Low moors cover a larger area than the two other types.
They are found in the river valleys, close to the lakes, and they are overgrown by meadow and rushes vegetation. The high moors are found on local ground elevations and they are overgrown by peat communities, containing atlantic species of plants. Spring comes later and is cooler than in central parts of Poland. Autumn is warmer and lasts longer. Wind is an important factor, regulating life conditions at the seaside.