Lac Welly is a Lake located in Saint-Alexis-des-Monts; Maskinongé, Quebec and has an elevation of 420 meters.

• Latitude: 46° 33' 0'' North   (decimal: 46.5500317)
• Longitude: 73° 16' 6'' West   (decimal: -73.2684637)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 420 meters
• Location: Saint-Alexis-des-Monts; Maskinongé
• Atlas of Canada Locator Map: Lac Welly
• GPS Coordinate Locator Map: Lac Welly Lat/Long