Ottawa River at Mattawa
Water level and flow at gauge 02JE013, Ontario. The level is normal for October. In the last 24 hours it has been falling.
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 116 years of monthly averages): 51.03 m167.42 ft – 52.61 m172.61 ft, median 52.46 m172.12 ft.
May 11, 2019 · approved records 1975–2025 (HYDAT). Right now the level is 3.31 m10.86 ft below that record.
0.05 m0.18 ft higher than on October 25, 2025 (52.27 m171.49 ft)
approved daily mean (HYDAT)
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 113 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
A mix of sun and cloud. Becoming cloudy this afternoon. Fog patches dissipating this morning. Wind southwest 20 km/h gusting to 40. High 16. UV index 3 or moderate.
Mainly cloudy with 40 percent chance of showers. Clearing before morning. Wind west 20 km/h becoming light late this evening. Low plus 5.
A mix of sun and cloud. Wind north 20 km/h becoming light late in the morning. High 9. UV index 3 or moderate.
Clear. Low minus 7.
Forecast for North Bay (58 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Mattawa RiverBelow Bouillon Lake · 15 km | 8.87 m29.08 ft | Normal |
| Aumond CreekMattawa · 18 km | 3.58 m11.74 ft | Very low |
| Wasi RiverAstorville · 49 km | 7.96 m26.11 ft | Very low |
| Ottawa RiverThorne · 52 km | 9.54 m31.30 ft | Very low |
| La Vase RiverNorth Bay · 53 km | 10.77 m35.32 ft | Normal |
| Temiscamingue A Temiscaming02JE025 · 54 km | 4.94 m16.21 ft | Very low |
About this gauge
Station: 02JE013 · Ottawa River at Mattawa
Location: 46.3204, -78.7108 · 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 Mattawa today?
The latest reading (Oct 25, 7 AM, local standard time) is 52.33 m (171.67 ft).
Is the Ottawa River at Mattawa high right now?
The level is normal for October.
Is the Ottawa River rising or falling?
In the last 24 hours it has been falling.
What is the highest water level ever recorded on the Ottawa River at Mattawa?
55.63 m (182.53 ft) on May 11, 2019, the highest instantaneous level in the approved records of the Water Survey of Canada (1975–2025). Events after 2025 are not yet in the approved archive.
How does the Ottawa River at Mattawa compare with a year ago?
The level is 0.05 m (0.18 ft) higher than on October 25, 2025 (52.27 m (171.49 ft), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02JE013 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.