The early history of Slupsk Region is dated from the Middle Epoch of Stone - that is, around 8000 years B.C. The crucial meaning for the final configuration of the Middle Pomerania landscape had the glacial and postglacial period. During this period two geomorphologic units of the Slupsk Region were formed: The Slupsk Plain and The Valley of the Slupia River.

The Slupsk Plain was formed by two altitudes stretching on both sides of The Valleys of the Slupia. The first one is the Slupsk Altitude in the eastern side with the average height of about 65 m above sea level. The second one is the Slawno Altitude in the western side. The western descent of the altitude on terrains of the contemporary city relatively softly descends in the riverbed direction, whereas the eastern descent characterizes with the steeper ascent. The riverbed adjoined to this descent creates flood terrace in the northern part of the city which rises about 15 m above sea level.

The lay of the river valley, on the mentioned earlier part, had a fundamental influence on the branching of the main stream into a few branches and a formation of many flood islands. Actually it is supposed that in that period the Slupia flowed within bounds of the contemporary city with several river bends, forming numerous loops and bends, which in the process of time disappeared due to the regulation of the main stream of the river.

In the frosty postglacial climate plant cover put on tundra character. Due to the progressive warming the coniferous forests (7000÷5000 B.C.) appeared on terrains of Middle Pomerania. Then the leafy forests appeared (5000÷3000 B.C.). The coniferous forest, which had been unified, was enriched with oaks, lindens, hornbeams and alders trees. In the last 3000 years, the light cooling of the climate came again. It caused the growth of the quantitative participation of the pine in species structure of forests.

The natural landscape of Slupsk Region in the ancient epoch and early Middle Ages differed fundamentally from the well-known landscape in contemporary times. The groundwater level was considerably higher than actually, that is why many lakes, ponds and swamps occurred among forests and fields. Marshlands occurred in places of today’s local meadows. The forest stand occupied the space much greater than actually. Today's relics of large forest complexes in the near area of the city are the South (brands pine) Grove, and the birch Northern Grove.

The advantages of the local geographical environment especially soils and the hydrographic system had a fundamental influence on the formation of first settlements. The Valley of the Slupia River was attracted with primitive settlers, causing the concentration of the early settlements in the most convenient places.