The Great Lakes Water Level Dashboard
Monthly mean
Lake-wide
Master gauge
Annual (derived from monthly)
Lake-wide range
Master gauge range
Master gauge average
Lake-wide average
Lake-wide records & statistics
Long-term average (1918-last year)
Low water (chart) datum
Monthly average (1918-last year)
Monthly record (1918-last year)
Monthly record range (1918-last year)
Current coordinated forecasts
Current coordinated 0-6 month out forecasts
Start Year:   End Year:   
Units: 
View: 
See Additional Data Options menu and Data Information page for more detailed data descriptions, options, and sources.
See Additional Data Options menu and Data Information page for more detailed data descriptions, options, and sources.
See Additional Data Options menu and Data Information page for more detailed data descriptions, options, and sources.
See Additional Data Options menu and Data Information page for more detailed data descriptions, options, and sources.
See Additional Data Options menu and Data Information page for more detailed data descriptions, options, and sources.
Water levels are referenced to the International Great Lakes Datum (1985). For more information, visit the Great Lakes Coordinating Committee website here.
General Information & Media Inquiries:
oar.glerl.www@noaa.gov
(734) 741-2235		Data Inquiries:
oar.glerl.data@noaa.gov