2026 – #1 Opening / Closing Dates of the 2026 Navigation Season and Maximum Allowable Drafts

February 19, 2026

2026 Increase of Seaway Tariffs

February 9, 2026

2025 – #19 Closing of the 2025 Navigation Season – Welland Canal

January 13, 2026

2025 – #18 Closing of the 2025 Navigation Season – Montreal-Lake Ontario Section

January 12, 2026

2025 – #17 Closing Period for the 2025 Navigation Season – Public Safety Notice

January 9, 2026

Public Safety Notice – Ice Conditions Near Navigation Channels

January 7, 2026

2025 – #16 Seaway Closing – Update

December 22, 2025

2025 – #15 Maximum Permissible Draft – Montreal to Lake Ontario and Welland Canal

December 15, 2025

2025 – #19 Dredging Wharf 10 / Guard Gate

November 18, 2025

2025 – #39 Speed Restrictions – MLO Section – Revision #5

November 13, 2025

2025 – #38 Temporary Change to Deliveries at St. Lambert Lock

November 7, 2025

2025 – #37 Linehandler Training at MLO and GLS Locks – Revision #1

November 6, 2025

2025 – #36 Low Water Levels Below St. Lambert Lock

November 5, 2025

2025 – #35 Linehandler Training at MLO and GLS Locks (Revised 2025/11/06)

November 3, 2025

2025 – #14 Closing of the 2025 Navigation Season

October 17, 2025

2025 – #18 Wharf 13 – Revised Maximum Drafts – Revision #1

October 17, 2025

2025 – #34 Temporary Increase of Lake Ontario Outflows

October 16, 2025

2025 – #33 Speed Restrictions – MLO Section – Revision #4 (Revised 2025/11/13)

October 16, 2025

2025 – #17 Dredging Wharf 10 Area (Cancelled 2025/11/18)

October 14, 2025

2025 – #16 Wharf 13 – Revised Maximum Drafts (Revised 2025/10/17)

October 7, 2025

2025 – #15 Planned Outages for Unwatering Gate Removal below Lock 1

October 6, 2025

2025 – #32 Linehandler Training at MLO and GLS Locks

October 3, 2025

2025 – #14 Bridge 11 and Bridge 21 – Increased Maximum Wind Speed

September 26, 2025

Temporary Exhibit Power Outages at Seaway Visitor Center – Facility Remains Open

September 9, 2025

2025 – #31 Longitudinal Hydraulic Assistance Tests at Côte Ste. Catherine Lock

September 4, 2025

2025 – #30 Commissioning Completed – Hands Free Mooring System at Iroquois Lock

August 22, 2025

2025 – #29 Speed Restrictions – MLO Section – Revision #3 (Revised 2025/10/16)

August 19, 2025

Great Lakes Seaway Announces Port Winners of 2024 Season “Pacesetter Award”

August 15, 2025

2025 – #13 Maximum Permissible Draft – Montreal to Lake Ontario and Welland Canal (Revised 2025/12/15)

August 12, 2025

2025 – #28 Speed Restrictions – MLO Section – Revision #2 (Revised 2025/08/19)

August 12, 2025