You will find water level information below from a variety of sources and our partners.

Information on Great Lakes/Seaway water levels can be found on the following websites:

US Army Corps of Engineers – Great Lakes Water Levels

National Ocean and Atmospheric Administration (NOAA) – Great Lakes Water Level dashboard

Fisheries and Oceans Canada: Weekly Water Level Bulletin

Great Lakes St. Lawrence Seaway System – Environment Information

Environment and Climate Change Canada: LEVELnews


In order to further assist customers with water level information for the Great Lakes, please find contacts for HWY H2O Port Partners that can provide specific information for that port below.

City of Port Colborne –
Cleveland-Cuyahoga County Port Authority – Matthew Welsh, Operations & Facilities Manager
PH: 216-377-1353 / Cell: 216-280-9002
Duluth Seaway Port Authoriy –
Goderich Port Management Corporation – Rowland Howe, Director
PH: 519-524-9867
Hamilton Port Authority –
Ogdensburg Bridge & Port Authority – John Rishe, Director of Commercial & Industrial Development
PH: (315) 393-4080 x 244 / Cell: 315-393-0996
Oshawa Port Authority – Donna Taylor, Harbourmaster
PH: 905-576-0400 / Cell: 904-433-7499
Port of Green Bay – Dean Haen, Director
PH: 920-492-4953
Ports of Indiana Burns Harbor / Portage – Nick Szymarek, Operations Manager
PH: 219-787-6951
Port of Milwaukee – Larry Sullivan, Chief Engineer
PH: 414-286-8140
Kevin McCluskey, Engineering
PH: 414-286-8140
Port of Monroe –
Port of Oswego Authority –
Port of Johnstown – Robert Dalley, General Manager
PH: 613-925-4228 x101
Cell: 613-246-5620
The Illinois International Port District / The Port of Chicago
Thunder Bay Port Authority – Guy Jarvis, Director of Engineering & Harbour Master
PH: 807-346-7389
Thunder Bay has a 24-hour water level recording that can be reached at (807) 344-3141. The water level recording is updated hourly. Port users may reference Chart 2314.Also, shipping agents and ship owners are provided with updated sounding information for critical routes within the harbour.
Toledo-Lucas County Port Authority – Joe Cappel, VP Business Development
PH: 419-243-8251
Toronto Port Authority – Michael Riehl, Deputy Harbour Master
PH: 416-427-1227
Valleyfield Harbour Corporation – Myriam Doucet, Secretaire et service comptable
Isabelle Viau, Coordonnatrice des services administratifs
Windsor Port Authority – David Cree, President & C.E.O
PH: 519-258-5741 x 24