Great Slave Lake at Hay River
Water level and flow at gauge 07OB002, Northwest Territories. The level is normal for October. 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 42 years of monthly averages): 156.46 m513.33 ft – 156.67 m514.02 ft, median 156.58 m513.72 ft.
May 11, 2021 · approved records 1984–2024 (HYDAT). Right now the level is 1.64 m5.37 ft below that record.
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily water level
Normal range: monthly averages of 46 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
Mainly cloudy with 30 percent chance of flurries early this morning. Clearing this morning. Wind becoming south 20 km/h gusting to 40 near noon. High plus 2. Wind chill minus 8 this morning. UV index 1 or low.
Clear. Wind south 30 km/h gusting to 50. Low minus 2. Wind chill minus 9 overnight.
Sunny. Wind south 20 km/h gusting to 40 becoming light in the afternoon. High plus 2. Wind chill minus 8 in the morning. UV index 1 or low.
Clear. Low minus 6.
Forecast for Hay River (6 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Hay RiverHay River · 15 km | 2.01 m6.60 ft | Normal |
| Buffalo RiverHighway No. 5 · 48 km | 1.94 m6.36 ft | Above normal |
| Kakisa RiverOutlet of Kakisa Lake · 92 km | 2.47 m8.10 ft | Normal |
| Yates RiverAlberta Boundary · 92 km | 6.68 m21.91 ft | No normal yet |
| Mackenzie RiverFort Providence · 107 km | 150.93 m495.17 ft | Normal |
| Hay RiverAlta/Nwt Boundary · 117 km | 284.66 m933.94 ft | Normal |
About this gauge
Station: 07OB002 · Great Slave Lake at Hay River
Location: 60.8599, -115.7342 · Northwest Territories
Same lake: Yellowknife Bay, Outlet of Barnston River
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 Great Slave Lake at Hay River today?
The latest reading (Oct 25, 8 AM, local standard time) is 156.61 m (513.81 ft).
Is the Great Slave Lake at Hay River high right now?
The level is normal for October.
Is the Great Slave Lake rising or falling?
In the last 24 hours it has been falling.
What is the highest water level ever recorded on the Great Slave Lake at Hay River?
158.25 m (519.18 ft) on May 11, 2021, the highest instantaneous level in the approved records of the Water Survey of Canada (1984–2024). Events after 2024 are not yet in the approved archive.
Where does this data come from?
Gauge 07OB002 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.