The third quarter of 2026 arrives with the Gulf in a familiar but uneasy posture. The ceasefire arrangements that took shape across the spring have held in their broad outline, yet none of the underlying disputes that drove the confrontation have been settled. For procurement teams and defence trading firms operating across the region, the practical question is no longer abstract. It is operational. What is Iran most likely to do between July and September, where will it apply pressure, and how should buyers read each move when it comes. This is an assessment of the most probable scenarios, written for people who have to make sourcing decisions rather than headlines.
The first thing to say plainly is that a full conventional war initiated by Iran against a Gulf state remains the least likely outcome of the quarter. Tehran has spent two decades building an approach that avoids precisely that kind of confrontation, because a direct state-on-state war is the one scenario in which Iranian conventional inferiority is exposed and American involvement becomes near certain. The pattern we examined in our look at the various GCC and US alliance conflict scenarios still holds. Iran prefers ambiguity, deniability, and pressure applied through means that fall short of the threshold that would justify a unified military response. Expect that preference to define the quarter.
If Iran chooses to apply visible pressure during the third quarter, the waterways are the most likely arena. The Strait of Hormuz carries roughly a fifth of the world's traded oil, and Iran has long understood that it does not need to close the strait to move markets. It only needs to make transit feel unsafe. Harassment of commercial shipping, brief detentions of vessels under regulatory pretexts, fast-boat manoeuvres near tankers, and the occasional seizure are all tools that generate maximum political and economic effect for minimal military cost. We set out the mechanics of this in our analysis of the transit fee logic that shapes Iranian behaviour in the strait, and that logic does not change in the third quarter.
"Iran does not need to close the Strait of Hormuz to achieve its aims. It only needs to make the world believe that it might."
A genuine closure of the strait remains improbable for the simple reason that it would damage Iran as much as anyone, choking its own export revenue and inviting the one response Tehran most wants to avoid. Our earlier work on how long a closure could realistically last and what it would cost set out why the scenario tends to be shorter and more limited than the headlines suggest. The more realistic third-quarter risk is intermittent disruption, a sequence of incidents rather than a single decisive act, each designed to raise insurance premiums and keep the strait in the news without ever crossing the line that triggers a coordinated naval response.
The greater source of unpredictability through the quarter is not the Iranian state acting directly but the network that acts on its behalf. The proxy architecture that Tehran has cultivated across the region, which we described as the most consequential military development in the Middle East since 2003, gives Iran the ability to apply pressure while preserving deniability. The Houthis in Yemen have demonstrated repeatedly that a relatively small inventory of drones and cruise missiles can threaten shipping in the Red Sea and reach targets deep inside the Arabian Peninsula. Iraqi militias retain the ability to strike at installations and bases. Each of these actors has its own local incentives, which means escalation can occur even when Tehran would prefer calm.
For the third quarter, the most likely proxy scenario is a continuation of low-level harassment punctuated by occasional higher-profile strikes timed to political moments, whether a negotiation milestone, an anniversary, or a perceived provocation. The threat is volumetric rather than decisive. It comes in the form of cheap drones and loitering munitions launched in numbers, the same challenge that has reshaped Gulf air defence priorities and driven the surge of interest in cost-effective drone interception systems. A single interceptor that costs several million dollars is not a sustainable answer to a drone that costs a few thousand, and Gulf planners know it.
The scenario that procurement teams plan against most seriously, even though it is not the most probable, is a direct Iranian or proxy strike on Gulf territory using ballistic missiles or drones. The region has now seen what large salvos look like in practice, and it has also seen that modern layered air defence can perform at a very high level when it is properly resourced and integrated. The interception performance demonstrated over the past year, which we covered in our piece on the reported near-total intercept rate achieved by UAE air defences, has changed the calculation on both sides. For Iran, the deterrent value of a strike is reduced if most of it is intercepted. For the Gulf states, the lesson is that the capability works but only at saturation levels of investment, which is exactly why orders for interceptors continue to outrun manufacturing capacity.
The most likely form of this tail risk during the quarter, should it materialise, is a limited and heavily telegraphed strike intended to make a political point rather than to inflict strategic damage, of the kind that allows both sides to claim a result and then de-escalate. The dynamics of that kind of controlled escalation, and the off-ramps that usually follow, are the subject of our assessment on what happens if the confrontation escalates and our reading of the live negotiations track around the strait.
Running underneath all of this is diplomacy. The ceasefire framework that emerged across the spring, which we traced in our coverage of the expected ceasefire timeline, gives both sides a reason to keep the temperature manageable through the summer. Our broader read on the chances of the wider conflict winding down during the third quarter points to a guarded optimism, with the caveat that the proxy network can produce incidents that neither principal fully controls. The base case for July through September is therefore managed tension. Periodic flare-ups, strong rhetoric, the occasional maritime incident, and a diplomatic process that absorbs the shocks without breaking.
For procurement officers and defence trading firms, the third quarter is less about predicting a single outcome than about positioning for a range of them. In the base case of managed tension, demand for air and missile defence, counter-drone systems, and intelligence and surveillance capability stays elevated, and the backlog pressure at the major suppliers continues to reward early contract placement. In the maritime-disruption case, the premium shifts toward vessel protection, naval sensors, and the logistics resilience that keeps supply chains moving when the strait is contested. In the tail-risk case of a direct strike, the lesson buyers have already internalised is reinforced, that layered defence works only at scale, and that delivery speed matters as much as capability when the threat is immediate.
The thread that runs through every scenario is that the Gulf is not buying for a single quarter. The orders being placed now are the next instalment of a sustained recapitalisation that runs well into the 2030s, driven by a threat picture that has become structural rather than episodic. Iran does not need to launch a war in the third quarter for the procurement logic to hold. The mere persistence of the threat, expressed through maritime harassment, proxy activity, and the standing possibility of a strike, is enough to keep Gulf defensive investment on its current trajectory. For buyers who can source quickly, compliantly, and across multiple supply chains at once, that environment is not a moment of crisis. It is the new baseline, and the firms that understand it will be the ones still standing when the quarter closes.