Big Otter Creek at Calton
Water level and flow at gauge 02GC026, Ontario. The flow is below normal for October (69% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 12 PM 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 51 years of monthly averages): 3.09 m³/s109 cfs – 6.80 m³/s240 cfs, median 4.28 m³/s151 cfs. Right now it is at 69% of the median.
February 25, 1985 · approved records 1977–2025 (HYDAT). Right now the flow is 2% of that record.
39% higher than on October 25, 2025 (2.14 m³/s75.6 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 50 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. High 18. UV index 4 or moderate.
Partly cloudy. Fog patches developing overnight. Low 7.
A mix of sun and cloud. Fog patches dissipating in the morning. High 17. UV index 4 or moderate.
Clearing. Low plus 1.
Forecast for Tillsonburg (20 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Silver CreekGrovesend · 10 km | 4.29 m14.06 ft | Normal |
| Catfish CreekAylmer · 14 km | 2.90 m9.53 ft | Normal |
| Catfish CreekSparta · 18 km | 0.31 m1.03 ft | Below normal |
| Big Otter CreekTillsonburg · 19 km | 2.93 m9.62 ft | Normal |
| Venison CreekWalsingham · 25 km | 6.70 m21.98 ft | Normal |
| Big CreekWalsingham · 25 km | 4.13 m13.53 ft | Normal |
About this gauge
Station: 02GC026 · Big Otter Creek Near Calton
Location: 42.7107, -80.8408 · Ontario
Same river: Tillsonburg, Above Otterville
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 Big Otter Creek at Calton today?
The latest reading (Oct 25, 12 PM, local standard time) is 9.79 m (32.10 ft) with a flow of 2.97 m³/s (105 cfs).
Is the Big Otter Creek at Calton high right now?
The flow is below normal for October (69% of the median).
Is the Big Otter Creek rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Big Otter Creek at Calton?
169 m³/s (5,968 cfs) on February 25, 1985, the highest instantaneous flow in the approved records of the Water Survey of Canada (1977–2025). Events after 2025 are not yet in the approved archive.
How does the Big Otter Creek at Calton compare with a year ago?
The flow is 39% higher than on October 25, 2025 (2.14 m³/s (75.6 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02GC026 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.