Baie Sepier is a Bay located in Baie-Atibenne; Matawinie, Quebec.

• Latitude: 47° 22' 7'' North   (decimal: 47.3686111)
• Longitude: 74° 21' 17'' West   (decimal: -74.3547222)
• Topography Feature Category: Bay
• Geographical Feature: Baie
• Canadian Province/Territory: Quebec
• Location: Baie-Atibenne; Matawinie
• Atlas of Canada Locator Map: Baie Sepier
• GPS Coordinate Locator Map: Baie Sepier Lat/Long