Supply Chain Action Points
Read this first — the conclusion, and the moves to make:
- By 10 July 2026, ask your forwarder in writing for the draft figure that applies to your service after 16 July and the number of boxes per call it removes. Owner is your freight manager.
- By 12 July 2026, rebook anything density-heavy and time-critical onto a sailing departing before 16 July, and flag every box that cannot make it.
- By 14 July 2026, add a documented alternative gateway for Montreal-bound freight, with Saint John and Halifax quoted at current dwell, so the reroute is priced before you need it.
- By 17 July 2026, set a weekly dwell check on Montreal, Saint John and Vancouver, and escalate any number that moves more than one day in a week.
- By 31 July 2026, build the dwell into customer promise dates for the whole third quarter instead of assuming the seven and nine days are temporary.
Kuehne+Nagel warns ongoing heat and dry weather will bring low water on the St. Lawrence River, triggering draft restrictions from 16 July that reduce vessel loading capacity and disrupt inland shipping. Canadian import rail dwell times already run high — Montreal 7 days, Saint John 9 days, Vancouver 6 days.
The Analysis
Sixteen July is the date, and the St. Lawrence is the water. Kuehne and Nagel has warned that ongoing heat and dry weather will pull water levels down on the St. Lawrence River, with draft restrictions starting 16 July that cut how much a vessel can load and disrupt inland shipping. Then look at the land leg, because the same notice carries the numbers that actually decide your month. Import rail dwell is running seven days at Montreal, nine at Saint John and six at Vancouver.
Those two facts are not sitting side by side by accident. One is a water problem and one is a rail problem, and they are on the same corridor. The St. Lawrence is the channel that feeds Montreal, and Montreal is already holding import boxes for a week before they move inland.
I have run boxes up that river, so let me say it plainly. This is a road problem wearing a weather costume. When the water drops, the river does not get wider, it gets shallower, and a shallow river puts a hard ceiling on how much steel you can float on it. Draft is not a detail. Draft is the size of the boat.
Take the two numbers apart. Draft restrictions from 16 July mean every vessel on the St. Lawrence has to sit higher in the water, and the only way to sit higher is to leave cargo behind. Nothing about the sailing schedule changes. The ship still sails. It just sails lighter. On a river run that already works a narrow margin, a few tens of centimetres of draft translate directly into the boxes that do not make the boat.
Why now is weather, but not only weather. Heat and dry conditions pulled the water level down, and that is the trigger Kuehne and Nagel is flagging. The part weather does not explain is the rail number. Montreal at seven days, Saint John at nine, Vancouver at six, those dwell times are the land leg, and they were already up. What you have is a corridor that was already slow on the ground taking on a fresh constraint on the water at the same time.
Who absorbs this. The shipper moving dense, heavy freight gets hit hardest, because draft restrictions bite hardest on weight. Steel, machinery, anything where the box hits its weight limit long before it hits its cubic limit. Light consumer goods in a box that cubes out will barely notice. Importers routing into Montreal are directly exposed. Anyone already using Saint John is looking at nine days of dwell before the draft even matters, which tells you the soft spot was on land first.
Timing. Sixteen July is the switch, so the clock you care about is the one that runs out before it. A vessel that loads light on 16 July was planned weeks ago, so the first boxes to miss the boat are already committed. Assume the effect reaches your container inside the next two to four sailings, and assume your inland leg does not get faster just because the river is the story.
One more layer before you price anything. Montreal is a gateway, not a destination. Boxes that land there move onward by rail or truck into Ontario and the U.S. Midwest, so a dwell problem at the port is also a problem for a consignee who never chose Montreal and may not even know their cargo touches it. If your routing guide says gateway Montreal and you have never asked which inland ramp your box actually clears through, this is the week to find out. Two of the three dwell figures in that notice belong to gateways competing with Montreal for the same inland traffic, and when one of them slows while the other is short on water, the pressure does not disappear. It redistributes, and it lands on whoever has the least slack.
Here is the one nobody will put in the headline. The rail dwell figures were elevated before the draft restriction, and that ordering matters. It means the binding constraint on this corridor is the land leg, and the draft cut makes it worse by pushing boxes onto a rail network that was already slow. Rail wants full blocks and steady flow. A vessel arriving with less cargo can leave a block short, and a short block is a slow block. The media will report the river. Your container will be late on the ramp.
A small piece of arithmetic. Assume a vessel call that would normally lift around 1,000 boxes, and assume the draft cut trims loading by 10 to 15 percent, which is my assumption and not a published figure. That is 100 to 150 boxes per call rolling to the next one. Assume the next call is five days out. If your box is in the rolled group, you just added about five days to the ocean leg, and that lands on top of the seven days Montreal is already holding it. Twelve days of dwell before your box even reaches the rail ramp. The assumption worth checking with your forwarder is the call cadence, because that is what converts a percentage into days.
What would flip this. Rain restores the level, restrictions lift, and it becomes a two-week story. Or cargo shifts to Saint John and Halifax and the corridor reroutes around the problem at the cost of a longer inland move. The condition that keeps it ugly is a dry summer that holds the level down through August, because then every call keeps loading light and the rollover compounds.
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