Raisin River at Black River
Water level and flow at gauge 02MC027, Ontario. The flow is normal for October (137% of the median). In the last 24 hours it has been falling.
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 20 years of monthly averages): 0.31 m³/s11.0 cfs – 0.92 m³/s32.5 cfs, median 0.55 m³/s19.5 cfs. Right now it is at 137% of the median.
April 7, 2017 · approved records 1987–2025 (HYDAT). Right now the flow is 2% of that record.
3174% higher than on October 25, 2025 (0.02 m³/s0.81 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 19 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 this afternoon. 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 Cornwall (12 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Raisin RiverWilliamstown · 20 km | 9.28 m30.45 ft | Normal |
| Payne RiverBerwick · 22 km | 6.18 m20.27 ft | Normal |
| South Nation RiverChesterville · 28 km | 5.61 m18.42 ft | No normal yet |
| Garry RiverAlexandria · 31 km | 81.51 m267.40 ft | Normal |
| Riviere DelisleAlexandria · 33 km | 1.67 m5.48 ft | Normal |
| Riviere DelisleGlen Norman · 34 km | 1.50 m4.91 ft | Above normal |
About this gauge
Station: 02MC027 · Raisin River at Black River
Location: 45.0806, -74.8681 · Ontario
Same river: Williamstown
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 Raisin River at Black River today?
The latest reading (Oct 25, 10 AM, local standard time) is 4.56 m (14.96 ft) with a flow of 0.75 m³/s (26.6 cfs).
Is the Raisin River at Black River high right now?
The flow is normal for October (137% of the median).
Is the Raisin River rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the Raisin River at Black River?
35.4 m³/s (1,250 cfs) on April 7, 2017, the highest instantaneous flow in the approved records of the Water Survey of Canada (1987–2025). Events after 2025 are not yet in the approved archive.
How does the Raisin River at Black River compare with a year ago?
The flow is 3174% higher than on October 25, 2025 (0.02 m³/s (0.81 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02MC027 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.