Southwest Arm is a Bay located in Nipissing, Ontario and has an elevation of 306 meters.

• Latitude: 46° 53' 11'' North   (decimal: 46.8863888)
• Longitude: 80° 8' 53'' West   (decimal: -80.1480555)
• Topography Feature Category: Bay
• Geographical Feature: Arm
• Canadian Province/Territory: Ontario
• Elevation: 306 meters
• Location: Nipissing
• Atlas of Canada Locator Map: Southwest Arm
• GPS Coordinate Locator Map: Southwest Arm Lat/Long