Saint-Laurent A Lasalle
Water level and flow at gauge 02OA016, Quebec. The flow is normal for October (95% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 9 AM local standard time (about an hour ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 71 years of monthly averages): 7,435 m³/s262,565 cfs – 8,780 m³/s310,063 cfs, median 8,080 m³/s285,343 cfs. Right now it is at 95% of the median.
April 2, 1976 · approved records 1960–2025 (HYDAT). Right now the flow is 53% of that record.
10% higher than on October 25, 2025 (7,000 m³/s247,203 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 71 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. Wind becoming southwest 20 km/h near noon. High 17. UV index 3 or moderate.
Clear. Becoming partly cloudy this evening. Low 10.
Mainly cloudy. 40 percent chance of showers in the morning. Clearing late in the afternoon. Wind west 20 km/h. High 17. UV index 3 or moderate.
Clear. Low plus 1.
Forecast for La Prairie (4 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Saint-Louis A Pointe-Claire02OA039 · 15 km | 20.92 m68.64 ft | Normal |
| Outaouais A la Marina de Sainte-Anne-De-Bellevue02OA033 · 25 km | 20.91 m68.60 ft | Very low |
| Outaouais A Sainte-Anne-De-Bellevue02OA013 · 26 km | 21.42 m70.29 ft | Very low |
| Saint-Laurent A Pointe-Des-Cascades02MC005 · 28 km | 21.00 m68.90 ft | Normal |
| Richelieu aux Rapides Fryers02OJ007 · 29 km | 0.70 m2.30 ft | Below normal |
| Mille Iles A Bois-Des-Filion02OA003 · 29 km | 0.80 m2.61 ft | Normal |
About this gauge
Station: 02OA016 · Saint-Laurent A Lasalle
Location: 45.4150, -73.6232 · Quebec
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 Saint-Laurent A Lasalle today?
The latest reading (Oct 25, 9 AM, local standard time) is 0.93 m (3.06 ft) with a flow of 7,710 m³/s (272,276 cfs).
Is the Saint-Laurent A Lasalle high right now?
The flow is normal for October (95% of the median).
Is the Saint-Laurent A Lasalle rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Saint-Laurent A Lasalle?
14,600 m³/s (515,595 cfs) on April 2, 1976, the highest instantaneous flow in the approved records of the Water Survey of Canada (1960–2025). Events after 2025 are not yet in the approved archive.
How does the Saint-Laurent A Lasalle compare with a year ago?
The flow is 10% higher than on October 25, 2025 (7,000 m³/s (247,203 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02OA016 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.