Panama Canal’s 32-slot daily transit regime takes effect as water constraints tighten

The Panama Canal Authority’s (ACP) second-stage capacity restriction became applicable to transit bookings from 15 September 2026. Daily availability is now 32 slots: nine at the Neopanamax Locks and 23 at the Panamax Locks. The change reduces the Panamax allocation from 25 slots, taking the combined daily availability from 34 to 32.

The ACP’s Advisory to Shipping A-29-2026 attributes the measure to water constraints in the Canal watershed. It reports cumulative rainfall from May through August at 34% below the historical average and watershed inflows 44% below average for the same period. The Authority also cites forecasts indicating that a potentially severe 2026–2027 El Niño could further reduce rainfall and runoff during the remainder of the wet season. The measures are described as temporary and intended to preserve service reliability while safeguarding water resources.

The restriction has direct implications for booking strategy. Under the applicable allocation table, the Panamax total comprises 18 Super and five Regular slots, alongside nine Neopanamax slots. In Booking Period 2, eight Panamax Super slots are offered, and no more than nine Supers may be booked per direction. The ACP states that a confirmed reservation remains the only mechanism that guarantees a transit date. Its related booking-system rules also limit the ability of customers already awarded a slot for the same transit date to obtain another one where competitors exist.

Capacity reductions do not currently coincide with the previously expected further Neopanamax draft cut. In a subsequent update, the ACP said the maximum authorised Neopanamax draft remains 14.63 metres (48.0 feet) Tropical Fresh Water; a reduction to 14.48 metres (47.5 feet) that had been scheduled for 1 October 2026 has been postponed following a review of Gatun Lake levels and weather projections.

Why this matters: the immediate constraint is capacity rather than the presently applicable Neopanamax draft. Owners, operators and charterers with Panama-dependent rotations should re-check booking status, loading windows, port-line-up assumptions and contractual time allowances. Cargo interests and claims handlers should preserve the booking confirmation, ACP notices, ETA history and communications on any missed connection, berth window, laycan or alleged delay. The ACP has said it will continue monitoring hydrology and may announce further changes, so voyage estimates should retain contingency rather than assume that the current 32-slot regime or draft limit will remain unchanged.