Port Phillip Bay Depth Profile: Average and Maximum Soundings

Port Phillip Bay (Victoria, Australia) is a large, relatively shallow temperate embayment.

• Average Depth: ~20 meters (66 feet)
• Maximum Depth: ~35 meters (115 feet), found primarily in the central shipping channels (e.g., the South Channel and West Channel) maintained for commercial vessel access to Melbourne ports.

The bay's general shallowness contributes to its rapid warming in summer and susceptibility to wind-driven mixing.