Maritime Bottlenecks: Red Sea Diversions Trigger Unprecedented Congestion at Asian Transshipment Hubs

The global shipping industry is grappling with a secondary wave of disruptions as the protracted crisis in the Red Sea forces a restructuring of maritime trade routes. Data released by maritime intelligence firm Linerlytica indicates that the Port of Singapore, the world's largest transshipment hub, is experiencing its worst congestion since the COVID-19 pandemic. The backlog is a direct result of vessels being rerouted around Africa's Cape of Good Hope to avoid Houthi missile and drone attacks in the Bab el-Mandeb Strait. These longer journeys, which add approximately 10 to 14 days to a voyage between Asia and Europe, have disrupted regular carrier schedules, leading to 'vessel bunching'—where multiple ships arrive at a port simultaneously rather than at staggered intervals. This has forced Singapore's port operator, PSA, to reopen decommissioned berths at the older Keppel Terminal to handle the overflow. The congestion is not limited to Singapore; other regional hubs like Jebel Ali in the UAE and Colombo in Sri Lanka are also reporting increased wait times. The strain on port infrastructure is driving spot freight rates upward, with the Shanghai Containerized Freight Index (SCFI) showing double-digit percentage increases on routes to the Mediterranean and Northern Europe over the last month. Logistics managers are warning that the current situation is effectively reducing global shipping capacity by absorbing available vessels into longer rotations. Beyond the immediate delays, the increased fuel consumption from high-speed transits around Africa is impacting carrier margins and contributing to higher carbon emissions across the sector. Insurance companies have also adjusted their risk assessments, with 'war risk' premiums for the Red Sea remaining at elevated levels, further incentivizing the longer route. As peak shipping season for the end-of-year holidays approaches, the industry faces a critical shortage of empty containers in key export hubs like Ningbo and Shanghai, as equipment is tied up on longer voyages. The consensus among maritime analysts is that unless a durable ceasefire is reached in Gaza or the Houthi threat is neutralized, these operational inefficiencies will persist through the remainder of 2026.