Lake Syamozero Lake Syamozero Lake Syamozero (, , Karelian: "Seämärvi") is a large freshwater lake in the Republic of Karelia, northwestern part of Russia. It is located west of Petrozavodsk, the capital of the Republic, and has an area of 265–270 km². Maximum depth is about 24 m. There are a few islands on the lake. Syamozero is used for fishery, water transport and timber rafting. The lake is part of the basin of the Shuya River, which flows into Lake Onega. On June 18, 2016, 14 children died when a storm caught a tour group on the lake. Four people have
Lake Onega months. The highest water level is in June–August and the lowest is in March–April. Rivers bring of water per year to the lake, that is up to 74% of the water balance; the rest is provided by precipitation. Most of the lake water (84% or per year) outflows via a single River Svir, and the remaining 16% evaporates from the lake surface. There are frequent storms more characteristic of a sea than a lake; waves of are not uncommon and may even reach . The lake freezes near the coast and bays in late November and December and around mid-January