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Provincial Forecast


Ten Day Forecasts for the Saskatchewan River System

October 24, 2025

Please find below the October 24, 2025 update:

Lake Diefenbaker Forecast Overview:

  • Inflows are expected to remain steady at around 110-120 m³/s.
  • Based on the forecasted inflows, the reservoir is expected to increase by 0.02over the next 10 days.
  • The current plan is to maintain outflows around 90m³/s.

Current Conditions: 

  • Flows on the South Saskatchewan River are continuing to slowly rise in response to the declining diversions in Alberta.
  • Inflows into Lake Diefenbaker are expected to remain steady near the lower quartile level.
  • Outflows from Gardiner Dam are expected to remain near 90 m³/s.
  • The reservoir is at 555.10 m. This level is between the lower quartile and median for this time of year. Water levels are expected to be steady next week.
  • Outflow from the Qu’Appelle River Dam resumed on Monday October 20. The Qu’Appelle River Dam outflow is 2 m3/s.

Hydrologic Conditions:

  • Minimal precipitation was received in the headwaters of the North and South Saskatchewan river basins over the past three days (Oct 20-22).
  • No precipitation is forecasted in the headwaters for the next week.

An Experienced Team

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