Issued 2021.07.09

The current level of Lake of the Woods is 322.66 m (1058.6 ft), a 15th percentile level for this time of year. The average lake level fell by 2 cm (1 in) over the past week and is expected to decline by 1 to 3 cm (1 in) over the next week.  

Lake of the Woods authorized outflow is 150 m3/s. 

The current level of Lac Seul is 355.36 m (1165.9 ft), a 10th percentile level for this time of year. The average lake level rose by 1 cm (1/2 in) over the past week and is expected to rise by 1 to 3 cm (1 in) over the next week.  

Lac Seul authorized outflow will be reduced from 100 to 75 m3/s on Monday July 12th

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Manitoba Hydro has provided the following weekly forecast for lake levels along the Winnipeg River in the Whiteshell. For questions related to water levels in this area, please contact Manitoba Hydro.

* Note: average is based on limited historic data.

The Winnipeg River receives most of its water from Ontario’s Lake of the Woods and Lac Seul, these flows are regulated by the LWCB. Manitoba Hydro models the expected rise and fall for lakes on the Winnipeg River downstream of Slave Falls Generating Station based on flows set by the LWCB, unregulated tributaries, and expected precipitation.

Please note:

  • Operations of Caribou Falls Generating Station in Ontario and local precipitation may cause daily fluctuations in levels.
  • Manitoba Hydro’s generating stations on the Winnipeg River pass on all the water received from upstream – generally referred to as “run of river”.
  • This weekly forecast will be provided during the open water season.

Issued 2021.07.02

The current level of Lake of the Woods is 322.69 m (1058.7 ft), a 15th percentile level for this time of year. The average lake level fell by 1 cm (1/2 in) over the past week and is expected to change little over the next week. Average daily inflow is estimated to be 120 m3/s over the next 7 days. 

Lake of the Woods authorized outflow is 150 m3/s. 

The current level of Lac Seul is 355.35 m (1165.8 ft), a 10th percentile level for this time of year. The average lake level rose by 4 cm (2 in) over the past week and is expected to rise by 2 to 6 cm (1 to 3 in) over the next week. Average daily inflow is estimated to be 200 m3/s over the next 7 days. 

Lac Seul authorized outflow is 100 m3/s. 

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Manitoba Hydro has provided the following weekly forecast for lake levels along the Winnipeg River in the Whiteshell. For questions related to water levels in this area, please contact Manitoba Hydro.

* Note: average is based on limited historic data.


The Winnipeg River receives most of its water from Ontario’s Lake of the Woods and Lac Seul, these flows are regulated by the LWCB. Manitoba Hydro models the expected rise and fall for lakes on the Winnipeg River downstream of Slave Falls Generating Station based on flows set by the LWCB, unregulated tributaries, and expected precipitation.


Please note:

  • Operations of Caribou Falls Generating Station in Ontario and local precipitation may cause daily fluctuations in levels.
  • Manitoba Hydro’s generating stations on the Winnipeg River pass on all the water received from upstream – generally referred to as “run of river”.
  • This weekly forecast will be provided during the open water season.

Whiteshell Forecast

Manitoba Hydro has provided the following weekly forecast for lake levels along the Winnipeg River in the Whiteshell. For questions related to water levels in this area, please contact Manitoba Hydro.

*Note: average is based on limited historic data.
The Winnipeg River receives most of its water from Ontario’s Lake of the Woods and Lac Seul, these flows are regulated by the LWCB. Manitoba Hydro models the expected rise and fall for lakes on the Winnipeg River downstream of Slave Falls Generating Station based on flows set by the LWCB, unregulated tributaries, and expected precipitation.


Please note:

  • Operations of Caribou Falls Generating Station in Ontario and local precipitation may cause daily fluctuations in levels.
  • Manitoba Hydro’s generating stations on the Winnipeg River pass on all the water received from upstream – generally referred to as “run of river”.
  • This weekly forecast will be provided during the open water season.

Issued 2021 06 23

The current level of Lake of the Woods is 322.70 m (1058.7 ft), a 15th percentile level for this time of year. The average lake level fell by 5 cm (2 in) over the past week and is expected to decline by 2 to 4 cm (1 to 2 in) over the next week. Average daily inflow is estimated to be 120 m3/s over the next 7 days.

Lake of the Woods authorized outflow will be reduced from 170 to 160 m3/s on Thursday June 24th and to 150 m3/s on Friday June 25th. The level of the Winnipeg River immediately below the Norman Dam is expected to drop by a total of 4 cm (2 in) over this period. Locations downstream will see the level drop by 1 to 2 cm (1 in). The level at Minaki will not be affected by these flow changes.

The current level of Lac Seul is 355.30 m (1165.7 ft), a 10th percentile level for this time of year. The average lake level rose by 4 cm (2 in) over the past week and is expected to rise by 2 to 4 cm (1 to 2 in) over the next week. Average daily inflow is estimated to be 170 m3/s over the next 7 days.

Lac Seul authorized outflow is 100 m3/s.

Issued 2021 06 18

The current level of Lake of the Woods is 322.75 m (1058.9 ft), a 20th percentile level for this time of year. The average lake level fell by 3 cm (1 in) over the past week and is expected to decline by 1 to 2 cm (1 in) over the next week. Average daily inflow is estimated to be 150 m³/s over the next 7 days.

Lake of the Woods authorized outflow will gradually be reduced by 10 m³/s per day over the next three days. Flow reductions will begin on June 19th and will continue until the outflow reaches 170 m³/s on Monday June 21st. The level of the Winnipeg River immediately below the Norman Dam is expected to drop by a total of 5 cm (2 in) over this period. Locations downstream will see the level drop by 1 to 2 cm (1 in). The level at Minaki will not be affected by these flow changes.

The current level of Lac Seul is 355.27 m (1165.6 ft), a 10th percentile level for this time of year. The average lake level rose by 7 cm (3 in) over the past week and is expected to rise by 2 to 4 cm (1 to 2 in) over the next week. Average daily inflow is estimated to be 170 m³/s over the next 7 days.

Lac Seul authorized outflow is 100 m³/s.

Issued 2021 06 15

The current level of Lake of the Woods is 322.75 m (1058.9 ft), a 20th percentile level for this time of year. The average lake level changed little over the past week and is expected to changed little over the next week. Average daily inflow is estimated to be 175 m³/s over the next 7 days.
Lake of the Woods authorized outflow is 200 m³/s.

The current level of Lac Seul is 355.25 m (1165.5 ft), a 10th percentile level for this time of year. The average lake level rose by 8 cm (3 in) over the past week and is expected to rise by 3 to 5 cm (1 to 2 in) over the next week. Average daily inflow is estimated to be 190 m³/s over the next 7 days.

Lac Seul authorized outflow is 100 m³/s.

Issued 2021 06 04

The current level of Lake of the Woods is 322.75 m (1058.9 ft), a 30th percentile level for this time of year. The average lake level fell by 1 cm (1/2 in) over the past week and is expected to decline by 1 to 3 cm (1 in) over the next week. Average daily inflow is estimated to be 175 m³/s over the next 7 days.

Lake of the Woods authorized outflow is gradually being reduced by 10 m³/s per day. Flow reductions began on June 1st and will continue until the outflow reaches 200 m³/s next week. The level of the Winnipeg River immediately below the Norman Dam is expected to drop by a total of 15 cm (6 in) over this period. Locations downstream will see the level drop by 5 to 10 cm (2 to 4 in). The level at Minaki will not be affected by these flow changes.

The current level of Lac Seul is 355.13 m (1165.1 ft), a 15th percentile level for this time of year. The average lake level rose by 8 cm (3 in) over the past week and is expected to rise by 5 to 8 cm (2 to 3 in) over the next week. Average daily inflow is estimated to be 240 m³/s over the next 7 days.

Lac Seul authorized outflow is 100 m³/s.