Sydenham River at Strathroy
Water level and flow at gauge 02GG005, Ontario. The flow is well below normal for October (25% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 9 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 50 years of monthly averages): 0.54 m³/s18.9 cfs – 1.64 m³/s57.8 cfs, median 0.76 m³/s26.9 cfs. Right now it is at 25% of the median.
February 2, 1968 · approved records 1967–2025 (HYDAT). Right now the flow is 0% of that record.
12% higher than on October 25, 2025 (0.17 m³/s6.04 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 49 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. Becoming a mix of sun and cloud this afternoon. Fog patches dissipating this morning. High 19. UV index 4 or moderate.
A few clouds. Fog patches developing overnight. Low 7.
Mainly cloudy. Fog patches dissipating in the morning. High 16. UV index 4 or moderate.
Cloudy. Low plus 2.
Forecast for Strathroy (1 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Ausable RiverSpringbank · 13 km | 1.64 m5.37 ft | Normal |
| Oxbow CreekKilworth · 17 km | 4.67 m15.31 ft | Normal |
| Dingman CreekBelow Lambeth · 23 km | 4.81 m15.78 ft | Very low |
| Parkhill CreekAbove Parkhill Reservoir · 23 km | 11.00 m36.09 ft | Very high |
| Sydenham RiverAlvinston · 23 km | 10.51 m34.47 ft | Below normal |
| South Parkhill CreekParkhill · 24 km | 1.79 m5.87 ft | Normal |
About this gauge
Station: 02GG005 · Sydenham River at Strathroy
Location: 42.9589, -81.6271 · Ontario
Same river: Owen Sound, Alvinston, Florence, Wallaceburg
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 Sydenham River at Strathroy today?
The latest reading (Oct 25, 9 AM, local standard time) is 1.81 m (5.95 ft) with a flow of 0.19 m³/s (6.75 cfs).
Is the Sydenham River at Strathroy high right now?
The flow is well below normal for October (25% of the median).
Is the Sydenham River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Sydenham River at Strathroy?
99.1 m³/s (3,500 cfs) on February 2, 1968, the highest instantaneous flow in the approved records of the Water Survey of Canada (1967–2025). Events after 2025 are not yet in the approved archive.
How does the Sydenham River at Strathroy compare with a year ago?
The flow is 12% higher than on October 25, 2025 (0.17 m³/s (6.04 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02GG005 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.