Catfish Creek at Aylmer
Water level and flow at gauge 02GC030, Ontario. The flow is normal for October (75% of the median). In the last 24 hours it has been falling.
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 35 years of monthly averages): 0.21 m³/s7.45 cfs – 1.04 m³/s36.6 cfs, median 0.35 m³/s12.4 cfs. Right now it is at 75% of the median.
November 13, 1992 · approved records 1987–2025 (HYDAT). Right now the flow is 0% of that record.
69% higher than on October 25, 2025 (0.16 m³/s5.54 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 34 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
Mainly sunny. Fog patches dissipating this morning. High 18. UV index 4 or moderate.
A few clouds. Fog patches developing overnight. Low 7.
Increasing cloudiness early in the morning. Fog patches dissipating in the morning. High 18. UV index 4 or moderate.
Cloudy. Low plus 3.
Forecast for St. Thomas (17 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Catfish CreekSparta · 7 km | 0.32 m1.04 ft | Normal |
| Silver CreekGrovesend · 11 km | 4.29 m14.06 ft | Normal |
| Big Otter CreekCalton · 14 km | 9.78 m32.09 ft | Below normal |
| Kettle CreekAbove St. Thomas · 14 km | 5.58 m18.30 ft | Normal |
| Kettle CreekSt. Thomas · 19 km | 6.04 m19.80 ft | Normal |
| Big Otter CreekTillsonburg · 23 km | 2.93 m9.62 ft | Normal |
About this gauge
Station: 02GC030 · Catfish Creek at Aylmer
Location: 42.7738, -80.9827 · Ontario
Same river: Sparta
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 Catfish Creek at Aylmer today?
The latest reading (Oct 25, 9 AM, local standard time) is 2.90 m (9.52 ft) with a flow of 0.27 m³/s (9.36 cfs).
Is the Catfish Creek at Aylmer high right now?
The flow is normal for October (75% of the median).
Is the Catfish Creek rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the Catfish Creek at Aylmer?
82.1 m³/s (2,899 cfs) on November 13, 1992, 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 Catfish Creek at Aylmer compare with a year ago?
The flow is 69% higher than on October 25, 2025 (0.16 m³/s (5.54 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02GC030 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.