Great Lakes Hydraulics and Hydrology

Quick Links

Redirecting...

Special Notice

The Detroit District is committed to providing high quality hydraulics and hydrology data to our customers. All near real time Great Lakes data reports will transition to a new HTML format and away from PDFs. New versions of the reports will be made available as they are developed and will be served in tandem with the PDF reports for a period of at least 30 days.

All users of the data reports are asked to send any feedback on the new products to hhpm@usace.army.mil. Please use “new report feedback” as the subject of your message. Thank you for your interest. 

Great Lakes Water Level Data

All levels are referenced to the International Great Lakes Datum of 1985 (IGLD 85). Water levels have been coordinated with Canada for 1918-2020.

For water level forecasts, click here.



Monthly mean lakewide average water levels

 

Download the Long Term Average, Maximum, and Minimum Great Lakes Water Levels in english units (feet).

Download the Long Term Average, Maximum, and Minimum Great Lakes Water Levels in metric units (meters).

Download the coordinated monthly mean water levels in english units.

Download the coordinated monthly mean water levels in metric units.

Graph of Great Lakes monthly mean lakewide average water levels from 1918-present.

 



 

 

Daily Lakewide Average Water Levels

 

Great Lakes Water Levels Report (Meters)

 

Current Month

Last Month

Two Months Ago

Three Months Ago

Graph of Great Lakes daily lakewide average water levels for this year and the previous year.
 

Great Lakes Water Levels Report (Feet)

 

Current Month

Last Month

Two Months Ago

Three Months Ago

 



 

 

Versions to be Discontinued

Connecting Channels Water Levels

Detroit River

St. Clair River

St. Marys River

 

New HTML Versions

Connecting Channels Water Levels

Detroit River

St. Clair River

St. Marys River



 

NOAA Water Level Gage Data

Preliminary Great Lakes water level gage data

Historic Great Lakes water level gage data

Detroit District Disclaimer

NOTICE: All data contained herein is preliminary in nature and therefore subject to change. The data is for general information purposes ONLY and SHALL NOT be used in technical applications such as, but not limited to, studies or designs. All critical data should be obtained from and verified by the United States Army Corps of Engineers, Detroit District, Engineering and Construction Division, Hydraulics and Hydrology Branch, 477 Michigan Ave., Detroit, MI 48226. The United States of America assumes no liability for the completeness or accuracy of the data contained herein and any use of such data inconsistent with this disclaimer shall be solely at the risk of the user.

Document Information and Assistance

NOTICE:  Not all documents accessible via this page are readable using optical character recognition (OCR). For more information and/or assistance please call 313-226-6441.