Lake Ontario’s water level remains at a record high for this time of year. The peak of 75.92 metres was last recorded on June 15th. Water levels have been declining and are expected to continue to slowly decline at a rate slightly less than 1 cm per day throughout the summer. The rate of decline will primarily depend on rainfall.
Record high inflows from Lake Erie are expected to cause Lake Ontario’s water level to remain at seasonal highs for at least the next several weeks.
Lake Ontario’s outflows were increased to 10,400 cubic metres per second in early June. This is equivalent to the record high outflows recorded from June 14 – August 7, 2017. High outflows from Lake Ontario will help to provide some relief to shoreline residents while still considering the effects on the St. Lawrence.
High wind and waves can cause shoreline erosion and wave uprush. Residents are advised to check local forecasts for warnings. Links for current Lake Ontario water levels can be found on Quinte Conservation’s website at
Shoreline residents are advised to either secure or remove loose items from their properties where there is a risk of encroaching flood water. Sandbags can be effective in protecting residences. Sandbags are not intended to protect accessory buildings. For more information on shoreline protection, contact the Quinte Conservation office and speak with expert staff in the planning and regulations department.
It is important that the public never wade through or play in flood water as it is extremely unsafe. Flood water can be contaminated with septic and hazardous debris.
Residents concerned that their shoreline well or septic has been compromised, should contact their local health unit. Do not drink the water and find an alternative water source to use. This message does not apply to municipal drinking water systems.
Residents are advised to obey any posted road closure signs and to check with their municipality for updates on road closures and boat launch closures.
Staff will continue to monitor conditions and will provide an update if forecasts and conditions change. For current water levels or to report any observations of flooding, residents are encouraged to visit

A FLOOD WARNING statement indicates that flooding is imminent or already occurring in specific watercourses or municipalities. Municipalities and individuals should take action to deal with flood conditions. This may include road closures and evacuations.
This message will be in effect until (or updated if anything significant changes before) Friday, September 27, 2019.