Medway River at London
Water level and flow at gauge 02GD008, Ontario. The flow is normal for October (100% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 8 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 66 years of monthly averages): 0.21 m³/s7.42 cfs – 2.08 m³/s73.5 cfs, median 0.34 m³/s11.8 cfs. Right now it is at 100% of the median.
February 20, 2018 · approved records 1971–2025 (HYDAT). Right now the flow is 0% of that record.
30% higher than on October 25, 2025 (0.26 m³/s9.08 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 63 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 London (4 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Stoney CreekLondon · 2 km | 7.04 m23.08 ft | Very low |
| Thames RiverByron · 7 km | 1.71 m5.60 ft | Below normal |
| Thames RiverEaling · 7 km | 0.41 m1.33 ft | Below normal |
| North Thames RiverBelow Fanshawe Dam · 8 km | 6.20 m20.34 ft | Normal |
| Dingman CreekBelow Lambeth · 11 km | 4.81 m15.78 ft | Very low |
| Oxbow CreekKilworth · 12 km | 4.67 m15.31 ft | Normal |
About this gauge
Station: 02GD008 · Medway River at London
Location: 43.0137, -81.2804 · 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 Medway River at London today?
The latest reading (Oct 25, 8 AM, local standard time) is 3.53 m (11.59 ft) with a flow of 0.34 m³/s (11.8 cfs).
Is the Medway River at London high right now?
The flow is normal for October (100% of the median).
Is the Medway River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Medway River at London?
149 m³/s (5,262 cfs) on February 20, 2018, the highest instantaneous flow in the approved records of the Water Survey of Canada (1971–2025). Events after 2025 are not yet in the approved archive.
How does the Medway River at London compare with a year ago?
The flow is 30% higher than on October 25, 2025 (0.26 m³/s (9.08 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02GD008 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.