The Lake Simcoe Region Conservation Authority advises that the water levels in Lake Simcoe are currently 219.16 m and are approximately 7 cm above average for this time of year.
The lake level has been slowly declining over the past two weeks and outflows from Lake Simcoe are increased outside of navigation hours. However, the forecasts for this week and early next week show varying rainfall amounts. Shoreline flooding is still occurring in some isolated low-lying areas close to the lake and water levels may increase further in response to precipitation.
The current forecast indicates westerly winds gusts in a range of 35-50 km/hr for this week. Winds acting on the high lake levels create waves, increasing the risk and extent of shoreline flooding that is already occurring.
Lake Simcoe water level
Currently the lake level is approximately seven centimetres higher than the average for this time of the year. Parks Canada has indicated outflows from Lake Simcoe are being increased outside of navigation hours. The current water level in Lake Simcoe is 219.16 m and is expected to remain above average in the coming weeks and will be subject to increases based on rainfall that is received.
Currently the lake level is approximately seven centimetres higher than the average for this time of the year. Parks Canada has indicated outflows from Lake Simcoe are being increased outside of navigation hours. The current water level in Lake Simcoe is 219.16 m and is expected to remain above average in the coming weeks and will be subject to increases based on rainfall that is received.
The following is a summary of the recent water levels on Lake Simcoe:
June 9, 2026 (current): 219.16 m
May 31, 2026: 219.22 m
May 2, 2026:219.38 m
April 20, 2026:219.41 m
March 31, 2026:219.06 m
Water safety
Exercise extreme caution around all bodies of water. Alert any children under your care to stay away from all watercourses and other bodies of water and supervise their activities.
Residents, especially in the historically flood-prone areas, are advised to take necessary precautions to protect themselves, their pets, and their property.
This Shoreline Hazard Watch – Moderate Risk will be in effect through June 26, 2026, at noon, or until otherwise updated. This replaces the Shoreline Hazard Watch – High Risk statement issued on May 23, 2026.
For further information, contact duty officer Bhavika Patel at 905-895-1281.