Baffin Bay July, the average temperature is . The annual precipitation is on the Greenland side and about twice as much near Baffin Island. The water temperature at the surface is below in winter. In summer, it varies from in the south-east to and below at north-west. The salinity exceeds 34‰ (parts per thousand) in winter. In summer, it is 32‰ on the east and 30–31‰ on the west. Deep waters are formed as a result of mixing of Arctic and Atlantic waters; their temperature is about and salinity is 34.5 ‰. In winter, 80% of the bay is covered with continuous
Investigator Strait boundary with Gulf St Vincent is the line from Troubridge Point on Yorke Peninsula to Cape Jervis on Fleurieu Peninsula. Its boundary with Backstairs Passage is the line from Cape Jervis on Fleurieu Peninsula to Kangaroo Head (west of Penneshaw) on Kangaroo Island. Flinders noted that Backstairs Passage is a body of water separate to Investigator Strait. The boundary between the strait and Nepean Bay on the north-east coast of Kangaroo Island is a line between Point Marsden and Kangaroo Head. The Strait’s western boundary by definition is the line from Cape Spencer on Yorke Peninsula to Cape Borda on