On 5 June 2026 the Panama Canal Authority issued an advisory to shipping that trims the maximum draft for its Neopanamax locks from 50 feet to 49.5 feet, effective 3 July (gCaptain, 5 June 2026). Six inches. On its own it barely touches a container ship. The reason the canal gave is the part that should reach your shipping plan: it is bracing for El Niño, and the US National Oceanic and Atmospheric Administration now puts the odds of that pattern forming this summer at 82% (NOAA Climate Prediction Center, June 2026). That is the same weather that drained the canal and stalled global shipping through 2023 and 2024.
What the canal actually changed
The cut is small and the Authority has said so plainly. The new ceiling is 49.5 feet of tropical fresh water, down half a foot, and it is the first operational restriction the canal has announced all year (The Maritime Executive, June 2026). As recently as 18 May the Authority said it did not expect transit restrictions through the end of 2026, with Gatun Lake held at historically high levels and 38 ships moving through each day. Most vessels load below the draft ceiling anyway, so a six-inch trim reaches a small slice of traffic today.
What changed is the posture. Canal Administrator Ricaurte Vásquez Morales told a maritime symposium in Washington this week that his planners were reviewing draft rules months earlier than usual, and that moderate restrictions could start as early as June, specifically to avoid repeating the congestion of the last drought. The canal is getting ahead of the forecast while the lake is still high.
The signal underneath the six inches
Look at what El Niño did the last time. Through late 2023 and into 2024 the Authority cut daily transits from around 36 to as few as 22, and at the worst point 18, while the maximum draft fell to 44 feet. Full-year transits dropped 29% in the 2024 fiscal year, and normal operations only returned around August 2024 (Seatrade Maritime, 2024). Ships that did not want to sit in a multi-week queue paid heavily at auction for a slot. That is the event the canal is working to avoid, and the forecast is not reassuring. NOAA puts El Niño at 82% to form by July, 96% to persist into the 2026-27 winter, and roughly two-in-three to strengthen to a strong event by late 2026 (NOAA Climate Prediction Center, June 2026).
The canal has less room to absorb a shock than it did a year ago. It is running close to its ceiling, about 38 transits a day against a practical maximum near 36 to 40, partly because the Strait of Hormuz crisis has pushed more US energy cargo through Panama toward Asia. BIMCO counted transits up 8% year on year in 2026, and 16% higher over the five weeks to mid-May (BIMCO, via gCaptain, June 2026). A canal already near full has fewer spare slots to ration when the water drops.
What this means for your China cargo
If you import from China into the US East Coast or Gulf Coast, your boxes very likely cross Panama. The same holds for a lot of cargo moving from China to the Atlantic side of Latin America. A repeat of 2023-24 would land in the 2026-27 northern winter, which is the window your holiday and first-quarter inventory ships in. The cost shows up as longer transit time, queue waits, and the slot or low-water surcharges that come with them, layered on a freight market already climbing into an early peak season.
The usual backup routes are not clean this year either. Sending East Coast cargo the long way through Suez runs it into the Hormuz disruption, and shifting to the US West Coast trades one bottleneck for rail capacity and drayage cost on the other side. None of these is a catastrophe, but each is a decision better made in September than discovered in January.
What to do before the dry season
Three moves now. Map your US-bound China sailings for the fourth quarter and early 2027, and build real buffer into the dates instead of assuming a clean transit. Decide your fallback routing before you need it, so a West Coast and rail plan is ready rather than improvised. And put the routing and a chokepoint contingency in writing with your forwarder, so a DDP or CIF quote names who absorbs a Panama surcharge instead of leaving it to land on your invoice.
That last point is where importers quietly lose money, because the routing sits inside a forwarder quote they never see. Full Production Management keeps every shipment visible: a named forwarder, the actual routing, and the surcharge terms agreed before the box moves, all in the WhatsApp thread you already follow. When a chokepoint tightens, you hear it from your own agent first. If you are weighing Incoterms and who carries the freight risk, our DDP shipping guide and our note on China to Europe shipping rates go with this one.
Sources: gCaptain, Panama Canal to Reduce Neopanamax Draft Limit as El Niño Concerns Mount, 5 June 2026; The Maritime Executive, Panama Canal Preemptively Lowers Draft Levels, June 2026; Panama Canal Authority, Advisory to Shipping; NOAA Climate Prediction Center, ENSO Diagnostic Discussion, June 2026; Seatrade Maritime, Panama Canal transits drop 29% in FY2024.