Rouge River at Markham
Water level and flow at gauge 02HC022, Ontario. The flow is below normal for October (57% 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 61 years of monthly averages): 0.58 m³/s20.4 cfs – 1.72 m³/s60.7 cfs, median 0.94 m³/s33.2 cfs. Right now it is at 57% of the median.
January 12, 2020 · approved records 1962–2024 (HYDAT). Right now the flow is 0% of that record.
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily flow
Normal range: monthly averages of 62 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. Fog patches dissipating this morning. High 17. UV index 4 or moderate.
Partly cloudy. Low 9.
Cloudy. Wind becoming northwest 20 km/h in the morning. High 15. UV index 3 or moderate.
Cloudy. Low minus 2.
Forecast for Markham (3 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Little Rouge CreekLocust Hill · 6 km | 10.21 m33.50 ft | Normal |
| West Duffins CreekAbove Green River · 8 km | 2.18 m7.16 ft | Below normal |
| Little Rouge CreekDicksons Hill · 8 km | 5.16 m16.94 ft | Very high |
| Highland CreekWest Hill · 10 km | 5.97 m19.58 ft | Very low |
| West Highland CreekScarborough Village · 12 km | 2.39 m7.85 ft | Very low |
| Duffins CreekAjax · 14 km | 0.76 m2.50 ft | Normal |
About this gauge
Station: 02HC022 · Rouge River Near Markham
Location: 43.8584, -79.2336 · Ontario
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 Rouge River at Markham today?
The latest reading (Oct 25, 9 AM, local standard time) is 3.30 m (10.83 ft) with a flow of 0.53 m³/s (18.9 cfs).
Is the Rouge River at Markham high right now?
The flow is below normal for October (57% of the median).
Is the Rouge River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Rouge River at Markham?
119 m³/s (4,202 cfs) on January 12, 2020, the highest instantaneous flow in the approved records of the Water Survey of Canada (1962–2024). Events after 2024 are not yet in the approved archive.
Where does this data come from?
Gauge 02HC022 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.