Raisin River at Williamstown
Water level and flow at gauge 02MC001, Ontario. The flow is normal for October (175% of the median). 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 65 years of monthly averages): 0.29 m³/s10.1 cfs – 3.62 m³/s128 cfs, median 1.46 m³/s51.6 cfs. Right now it is at 175% of the median.
April 14, 1978 · approved records 1969–2025 (HYDAT). Right now the flow is 2% of that record.
5971% higher than on October 25, 2025 (0.04 m³/s1.48 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 65 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. Wind chill minus 3 this morning. UV index 3 or moderate.
Increasing cloudiness. Low 8.
Cloudy. 60 percent chance of showers in the morning and early in the afternoon. Clearing late in the afternoon. Wind becoming northwest 20 km/h late in the morning. High 13. UV index 2 or low.
Clear. Low minus 4.
Forecast for Cornwall (16 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Garry RiverAlexandria · 17 km | 81.51 m267.40 ft | Normal |
| Riviere BeaudetteGlen Nevis · 17 km | 8.39 m27.54 ft | Normal |
| Riviere DelisleGlen Norman · 18 km | 1.49 m4.89 ft | Above normal |
| Riviere DelisleAlexandria · 19 km | 1.67 m5.48 ft | Normal |
| Raisin RiverBlack River · 20 km | 4.56 m14.95 ft | Normal |
| Payne RiverBerwick · 37 km | 6.18 m20.28 ft | Normal |
About this gauge
Station: 02MC001 · Raisin River Near Williamstown
Location: 45.1555, -74.6381 · Ontario
Same river: Black River
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 Williamstown today?
The latest reading (Oct 25, 7 AM, local standard time) is 9.28 m (30.46 ft) with a flow of 2.55 m³/s (90.1 cfs).
Is the Raisin River at Williamstown high right now?
The flow is normal for October (175% 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 Williamstown?
117 m³/s (4,132 cfs) on April 14, 1978, the highest instantaneous flow in the approved records of the Water Survey of Canada (1969–2025). Events after 2025 are not yet in the approved archive.
How does the Raisin River at Williamstown compare with a year ago?
The flow is 5971% higher than on October 25, 2025 (0.04 m³/s (1.48 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02MC001 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.