Lesser Slave River at Slave Lake
Water level and flow at gauge 07BK001, Alberta. The flow is above normal for October (138% of the median). In the last 24 hours it has been falling.
Latest reading Oct 25, 8 AM local standard time (2 hours ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 62 years of monthly averages): 26.2 m³/s926 cfs – 54.6 m³/s1,930 cfs, median 40.5 m³/s1,430 cfs. Right now it is at 138% of the median.
September 1, 1996 · approved records 1988–2025 (HYDAT). Right now the flow is 39% of that record.
431% higher than on October 25, 2025 (10.5 m³/s371 cfs)
approved daily mean (HYDAT)
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily flow
Normal range: monthly averages of 60 years (lighter band: 10th–90th percentile). Past years: approved daily means from HYDAT, the Water Survey of Canada archive (the latest year published is 2025). 2026: daily means of the provisional real-time readings collected by Canada River Levels since October 22, 2026.
Weather near this gauge
Sunny. Fog patches dissipating this morning. Wind becoming southeast 20 km/h this afternoon. High plus 2. Wind chill minus 9 this morning. UV index 1 or low.
Clear. Wind southeast 20 km/h becoming light overnight. Low minus 6. Wind chill near minus 10.
Sunny. Wind becoming southeast 20 km/h in the morning. High plus 4. Wind chill minus 13 in the morning. UV index 1 or low.
Cloudy periods. Low minus 4.
Forecast for Slave Lake (3 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Lesser Slave LakeSlave Lake · 1 km | 576.64 m1,891.87 ft | Normal |
| Sawridge CreekSlave Lake · 4 km | 1.64 m5.37 ft | Very high |
| Driftwood RiverThe Mouth · 34 km | 1.04 m3.41 ft | Above normal |
| Saulteaux RiverSpurfield · 37 km | 1.53 m5.00 ft | Above normal |
| Swan RiverKinuso · 42 km | 583.55 m1,914.52 ft | Very high |
| Fawcett LakeSmith · 44 km | 611.49 m2,006.19 ft | Above normal |
About this gauge
Station: 07BK001 · Lesser Slave River at Slave Lake
Location: 55.3049, -114.7561 · Alberta
Water levels are measured from a local reference point at each gauge, not from sea level, so they cannot be compared between gauges.
Official sources
For flood warnings, advisories and approved data, always use these official services:
Questions
What is the water level of the Lesser Slave River at Slave Lake today?
The latest reading (Oct 25, 8 AM, local standard time) is 576.46 m (1,891.28 ft) with a flow of 55.8 m³/s (1,971 cfs).
Is the Lesser Slave River at Slave Lake high right now?
The flow is above normal for October (138% of the median).
Is the Lesser Slave River rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the Lesser Slave River at Slave Lake?
143 m³/s (5,050 cfs) on September 1, 1996, the highest instantaneous flow in the approved records of the Water Survey of Canada (1988–2025). Events after 2025 are not yet in the approved archive.
How does the Lesser Slave River at Slave Lake compare with a year ago?
The flow is 431% higher than on October 25, 2025 (10.5 m³/s (371 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 07BK001 of the Water Survey of Canada (Environment and Climate Change Canada). Real-time data are provisional and may be revised. We check for new readings every 30 minutes. Canada River Levels is not an official source.