Rideau River below Merrickville
Water level and flow at gauge 02LA011, Ontario. The flow is above normal for October (149% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 10 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 15 years of monthly averages): 10.2 m³/s360 cfs – 16.6 m³/s584 cfs, median 13.5 m³/s477 cfs. Right now it is at 149% of the median.
April 3, 1992 · approved records 1980–2025 (HYDAT). Right now the flow is 12% of that record.
271% higher than on October 25, 2025 (5.42 m³/s191 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 20 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 southwest 20 km/h. High 16. UV index 3 or moderate.
Increasing cloudiness this evening. Low 8.
Mainly cloudy. 60 percent chance of showers in the morning and early in the afternoon. Wind becoming northwest 20 km/h late in the morning. High 13. UV index 3 or moderate.
Clear. Low minus 3.
Forecast for Kemptville (16 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Kemptville CreekKemptville · 13 km | 5.96 m19.54 ft | Above normal |
| North Branch South Nation RiverHeckston · 24 km | 0.80 m2.62 ft | Above normal |
| South Nation RiverSpencerville · 25 km | 11.02 m36.16 ft | Normal |
| Jock RiverRichmond · 33 km | 6.34 m20.80 ft | Above normal |
| Rideau RiverBelow Manotick · 34 km | 4.11 m13.47 ft | Very high |
| Tay River In Perth02LA024 · 35 km | 7.24 m23.76 ft | Normal |
About this gauge
Station: 02LA011 · Rideau River Below Merrickville
Location: 44.9500, -75.8191 · Ontario
Same river: Ottawa, Below Manotick, Above Rideau Falls
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 Rideau River below Merrickville today?
The latest reading (Oct 25, 10 AM, local standard time) is 4.62 m (15.16 ft) with a flow of 20.1 m³/s (710 cfs).
Is the Rideau River below Merrickville high right now?
The flow is above normal for October (149% of the median).
Is the Rideau River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Rideau River below Merrickville?
169 m³/s (5,968 cfs) on April 3, 1992, the highest instantaneous flow in the approved records of the Water Survey of Canada (1980–2025). Events after 2025 are not yet in the approved archive.
How does the Rideau River below Merrickville compare with a year ago?
The flow is 271% higher than on October 25, 2025 (5.42 m³/s (191 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02LA011 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.