Ottawa River at Britannia
Water level and flow at gauge 02KF005, Ontario. The flow is normal for October (73% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 7 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 65 years of monthly averages): 575 m³/s20,306 cfs – 1,130 m³/s39,906 cfs, median 816 m³/s28,817 cfs. Right now it is at 73% of the median.
April 30, 2019 · approved records 1979–2024 (HYDAT). Right now the flow is 10% of that record.
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily flow
Normal range: monthly averages of 64 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 late this morning. High 17. UV index 3 or moderate.
A few clouds. Increasing cloudiness late this evening then 30 percent chance of showers before morning. Low 9.
Cloudy. 60 percent chance of showers in the morning. Becoming a mix of sun and cloud in the afternoon. Wind becoming northwest 20 km/h in the morning. High 14. UV index 2 or low.
Clear. Low minus 2.
Forecast for Ottawa (Kanata - Orléans) (12 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Graham CreekNepean · 2 km | 0.83 m2.72 ft | Normal |
| Rideau RiverOttawa · 11 km | 3.07 m10.08 ft | Very high |
| Jock RiverRichmond · 12 km | 6.34 m20.81 ft | Above normal |
| Outaouais A Hull02LA015 · 13 km | 41.27 m135.39 ft | Below normal |
| Rideau RiverAbove Rideau Falls · 14 km | 4.97 m16.29 ft | Very high |
| Rideau RiverBelow Manotick · 15 km | 4.11 m13.47 ft | Very high |
About this gauge
Station: 02KF005 · Ottawa River at Britannia
Location: 45.3513, -75.8267 · Ontario
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 Ottawa River at Britannia today?
The latest reading (Oct 25, 7 AM, local standard time) is 57.83 m (189.72 ft) with a flow of 593 m³/s (20,942 cfs).
Is the Ottawa River at Britannia high right now?
The flow is normal for October (73% of the median).
Is the Ottawa River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Ottawa River at Britannia?
6,030 m³/s (212,948 cfs) on April 30, 2019, the highest instantaneous flow in the approved records of the Water Survey of Canada (1979–2024). Events after 2024 are not yet in the approved archive.
Where does this data come from?
Gauge 02KF005 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.