Grand River at Marsville
Water level and flow at gauge 02GA014, Ontario. The flow is below normal for October (46% 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 68 years of monthly averages): 0.72 m³/s25.6 cfs – 5.25 m³/s185 cfs, median 1.38 m³/s48.7 cfs. Right now it is at 46% of the median.
March 20, 1948 · approved records 1948–2025 (HYDAT). Right now the flow is 0% of that record.
48% lower than on October 25, 2025 (1.23 m³/s43.4 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 67 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. Wind becoming southwest 20 km/h late this morning. High 18. UV index 4 or moderate.
Partly cloudy. Low 9.
Cloudy. Wind northwest 20 km/h becoming light late in the morning. High 13. UV index 2 or low.
Cloudy. Low minus 2.
Forecast for Orangeville (15 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Credit River Erin BranchHillsburgh · 13 km | 1.92 m6.29 ft | Normal |
| Grand RiverBelow Shand Dam · 16 km | 1.55 m5.07 ft | Below normal |
| Credit RiverOrangeville · 17 km | 11.19 m36.70 ft | Below normal |
| Credit River Erin BranchAbove Erin · 17 km | 2.04 m6.68 ft | Normal |
| Credit RiverCataract · 20 km | 1.33 m4.37 ft | Normal |
| Irvine RiverSalem · 23 km | 1.70 m5.57 ft | Very low |
About this gauge
Station: 02GA014 · Grand River Near Marsville
Location: 43.8617, -80.2722 · Ontario
Same river: Galt, Below Shand Dam, West Montrose, Dundalk, Doon, Brantford
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 Grand River at Marsville today?
The latest reading (Oct 25, 8 AM, local standard time) is 3.30 m (10.81 ft) with a flow of 0.64 m³/s (22.5 cfs).
Is the Grand River at Marsville high right now?
The flow is below normal for October (46% of the median).
Is the Grand River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Grand River at Marsville?
447 m³/s (15,786 cfs) on March 20, 1948, the highest instantaneous flow in the approved records of the Water Survey of Canada (1948–2025). Events after 2025 are not yet in the approved archive.
How does the Grand River at Marsville compare with a year ago?
The flow is 48% lower than on October 25, 2025 (1.23 m³/s (43.4 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02GA014 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.