A flat plain extending eastward toward Pinarhisar, old vineyard ridges to the west, drought-resistant orchards, and oak forests stretching south surround the western side of Kaynarca. To the north is Mahya Mountain, an extension of the Yildiz Mountains, with an altitude of 1030 m, whose slopes extend close to the town of Kaynarca. As you move northeast, you find the Kurudere forests. In the south, there are flat agricultural lands, extending about 3.5 km southward. The lowest point relative to sea level is 200 m, while the highest point is 254 m.

Four large and eight small springs within the town merge to form the Kaynarca Stream, which flows at 1200 liters per second. Until 1975, the stream irrigated the land and the region called Cukura for rice cultivation. Later, due to the difficulty of growing rice and its low profitability, beans, beets, carrots, and cucumbers began to be cultivated in these lands. Kaynarca beans are famous. To the west, there is Cayir Stream, which is formed by the melting snowwaters from the Yildiz Mountains.