The Yenisey Gulf is formed by the river widening to an average of 50 km (31 mi) for up to 250 km (160 mi) in a roughly north-south direction, between a latitude of 70° 30′ N in the area around Munguy settlement, north of Dudinka. The whole region of the lower Yenisey is bleak and sparsely inhabited, and the settlements are built on permafrost ground. There is no vegetation except for mosses, lichens and some grass. Coastal waters are habitats for beluga whales.
The maximum depth of the Yenisey Gulf is 63 m (208 ft). The mouth of the gulf is roughly located at 72° 30′ N, in the area of Sibiryakov Island, in the Kara Sea.
The Yenisey has some flat, low-lying islands at its southern end, the Brekhovsky Islands (Бреховские острова) 70°30′N82°45′E / 70.500°N 82.750°E / 70.500; 82.750. They stand where the river flows into the estuary. Lakes and swamps surround this area, which features many arms through which lesser rivers of the tundra flow across wetlands into the Yenisey basin.[2]
Further northwards the Yenisey widens and becomes a clear expanse. The water turns brackish at this point. There are three small islands located almost in the middle of the gulf, the Bolshoi Korsakovsky Islands (острова Большой Корсаковский). The largest one is 4 km (2.5 mi) long and 1.2 km (0.75 mi) wide. 72°17′N81°01′E / 72.283°N 81.017°E / 72.283; 81.017. Burnyy Island is located right in the middle of the gulf. Chaishnyy is the closest to the shore.
The weather pattern in this desolate area is severe, with long and bitter winters and frequent blizzards and gales. The Yenisey estuary is frozen for about nine months in a year and even in summer it is never quite free of ice floes. During the winter the shipping lanes are kept open by icebreakers.
