Water levels on Lake Huron are always changing. They can change within a few hours (short-term changes) in response to a storm system, undergo seasonal changes in response to higher evaporation rates in the late fall, winter and spring, and higher precipitation and melting snowpack in spring, to long-term changes that can see Lake Huron fluctuate within a range of about two metres between highs and lows.

Long-term changes in the level of the lake is the difference between the amount of water coming into the lake and the amount going out. This is the determining factor in whether the water level will rise, fall or remain stable. When several months of above-average precipitation occur with cooler, cloudy conditions that cause less evaporation, the levels gradually rise. Likewise, prolonged periods of lower-than average precipitation and warmer temperatures typically result in lowering of water levels. When less ice forms on the lake, as has happened in recent winters, evaporation can be much greater.

Southern Georgian Bay Shoreline Stewardship Guide  


High Water Levels: How they impact shore processes and shore protection with Pat Donnelly, LHCCC

Harnessing Nature’s Power: Natural Infrastructure Vs. Hardened Shorelines

Climate Changes 

Coastal Processes  with Professor Robin Davidson-Arnott

Going with the Flow: Water Levels and What Shapes Lake Huron

Great Lakes Now (USA) High Water Levels

IJC TRi-Board Public Webinar July 2020


Tiny Township Press Release June 2, 2020 

International Joint Commission  www.ijc.org

Great Lakes St. Lawrence Cities Initiative  www.glslcities.org

Lake Huron Centre for Coastal Conservation https://www.lakehuron.ca/

Georgian Bay Great Lakes Foundation (GBGLF) www.georgianbaygreatlakesfoundation.com

Severn Sound Environmental Association https://www.severnsound.ca/programs-projects/monitoring/water-levels

Fisheries and Oceans Canada puts out a Monthly Water Level Bulletin including the average water level for the month and previous record highs and lows.

NOAA Great Lakes  Environmental Research Laboratory records Great Lakes Water Levels 

Great Lakes Now (USA) – a regional news and information hub greatlakesnow.org