[2] The significant amount of precipitation in this area ensures an abundant flow of water in the river and is due both to the geographical location near the Pacific Ocean and to the mountainous orography of the basin.

The annual amount of precipitation on the Kurile Lake is 1,400 millimetres (55 in); it can significantly exceed this figure in mountainous areas.

[4] Kurile Lake and the upper half of the Ozyornaya channel lie within this volcanic region, and the geothermal activity is often manifested here in the form of hot springs.

[6] A distinctive feature of Ozyornaya is the absence of ice cover in winter: the river freezes only in its mouth part.

[2] Because the river has a considerable geothermal underground inflow and has a steady, fast current throughout its course, ice does not form during the cold season.