Onega, Russia Onega, Russia Onega () is a town in the northwest of Arkhangelsk Oblast, Russia, situated at the mouth of the Onega River, a few kilometers from the shore of the Onega Bay of the White Sea. Population: The Pomor village of Ust-Onega () was first mentioned in Novgorodian documents in the 14th century. It was chartered on August 19, 1780, after Pyotr Shuvalov had sold his rights to fell timber to English industrialists who built several sawmills there. Since 1784, Onega was the administrative center of Onezhsky Uyezd. Within the framework of administrative divisions, Onega serves as the administrative center
Lake Onega in its center. Thawing starts in April in the tributaries and reaches the lake in May. Water in the deep parts is clear, with the visibility up to . In the bays, the visibility may decrease to about a meter. The water is fresh, with a salinity of 35 mg/L. This is relatively low for a lake and is about times lower than in the other large lake of the area, Lake Ladoga. The maximum surface water temperature is on the open lake and in the bays. The deep waters are much colder, from in winter to in summer. Weather