Recent events in the Middle East have turned the fuel vulnerability Australia confronted during the Red Sea disruptions last year into an immediate strategic test.
Following US and Israeli strikes on Iran, Tehran has claimed that the Strait of Hormuz is closed and warned that ships attempting to transit the waterway risk attack. The narrow channel between Iran and Oman normally carries around one fifth of global oil and gas supply, making it one of the most important energy chokepoints in the world.
For most countries, disruption there means higher prices. For Australia, it raises a more uncomfortable question: how resilient is the supply chain that delivers fuel to the continent?
Australia exports vast quantities of energy but remains structurally dependent on imported liquid fuels. More than 90 percent of refined petroleum products consumed domestically are imported, largely from Asian refineries that themselves rely heavily on Middle Eastern crude.
That means a crisis in the Persian Gulf does not simply affect Australia indirectly through global markets; it also affects the refineries—particularly in Singapore, South Korea and Japan—that produce the petrol, diesel and jet fuel that Australia imports. In other words, the vulnerability sits two steps upstream in the supply chain.
With Hormuz now effectively closed to commercial traffic, Asian refiners face tightening crude supply and shipping disruption. The immediate consequence will be price volatility. The strategic consequence is something more serious: a shrinking buffer between normal supply and disruption.
Australia’s fuel vulnerability is often discussed in terms of global supply. But geography suggests a more uncomfortable reality: even if Middle Eastern crude can eventually be rerouted or sourced elsewhere, the refined fuel Australia imports must still pass through the narrow maritime channels of Southeast Asia before reaching Australian ports.
These Indonesian straits (Malacca, Lombok and Sunda) carry the majority of Australia’s trade, with roughly 83 percent of maritime imports and around 90 percent of exports moving through these routes. In other words, the closure of Hormuz is only the first layer of vulnerability.
The second lies much closer to home.
Imagine a scenario in which disruption in the Middle East constrains crude supply to Asian refineries while, at the same time, maritime disruption, coercion or conflict closes the Sunda Strait or other Indonesian passages. The result would not simply be expensive fuel; it would be physically constrained access to refined products. Australia would suddenly be competing for limited supplies delivered along longer and more contested routes.
The strategic question becomes unavoidable: how quickly could Australia move fuel internally if imports slowed or stalled? This is where northern Australia enters the discussion—not as a victim of fuel insecurity, but potentially as part of the solution.
Australia’s northern ports sit closer to Southeast Asian refining hubs than southern capitals. Darwin lies less than four days’ sailing from Singapore. In a crisis, geography alone makes northern Australia the most logical entry point for emergency fuel shipments and redistribution across the continent.
Yet northern Australia remains the least developed part of Australia’s liquid fuel logistics network. Storage capacity is limited, domestic refining has largely disappeared and the fuel infrastructure that does exist is largely designed for local consumption rather than national contingency. This matters for defence as much as for the economy.
Northern Australia hosts key training ranges, airbases and rotational deployments for Australian and allied forces. It is increasingly central to Australia’s deterrence posture. But a northern force posture without assured fuel supply chains risks becoming strategically brittle.
Fuel is the quiet enabler of deterrence. Without it, runways, ports and logistics hubs become stranded infrastructure.
Australia has taken steps in recent years to rebuild strategic fuel reserves and increase storage capacity, including establishing offshore reserves and expanding domestic stockholding obligations. These initiatives are important, but they remain largely designed around compliance with international energy obligations and short-term supply shocks.
The emerging strategic environment suggests a different requirement. Rather than treating fuel security purely as a stockpiling problem, Australia should think about distributed fuel resilience. That includes larger northern storage facilities, greater redundancy in import terminals and expanded capacity to move fuel across the continent during disruption. It also means accelerating diversification through alternative fuels, synthetic fuels and defence-grade energy systems that reduce reliance on imported petroleum over time. Such investments would strengthen both economic resilience and military readiness.
The lesson from the current crisis is not simply that Hormuz matters; it is that Australia’s fuel security depends on a chain of maritime chokepoints stretching from the Persian Gulf to the Indonesian archipelago. Disruption at any point along that chain reduces Australia’s margin for error. Hormuz has become the first link in that chain to break. If disruption were to extend into Southeast Asian sea lanes, Australia would face a strategic test that no amount of last-minute fuel rationing could easily solve.
Facing that possibility, the centre of gravity in Australia’s fuel-security debate must shift north, because the geography of resilience increasingly runs through northern Australia.