Galt 02GA003
Reading the latest value from Water Survey of Canada…
Shaded band: the middle half of the month's daily means in the agency's archive.
Live readings are provisional: the agency publishes them before checking them and can revise them. CanoeMap shows the agency's numbers as published. See this gauge at the agency
Latest value at each gauge
Typical level and flow by month
Galt 02GA003
Flow is typically highest in April (52.4 m³/s) and lowest in September (17.4 m³/s). Level is typically highest in March (1.12 m) and lowest in October (0.72 m).
| Month | Typical flow (m³/s) | Middle half of days | Typical level (m) | Middle half of days |
|---|---|---|---|---|
| January | 24.4 | 17.8 – 54.0 | 0.91 | 0.79 – 1.24 |
| February | 25.0 | 17.5 – 49.4 | 0.89 | 0.76 – 1.13 |
| March | 51.4 | 28.7 – 88.3 | 1.12 | 0.89 – 1.51 |
| April | 52.4 | 31.9 – 96.7 | 1.08 | 0.92 – 1.47 |
| May | 29.7 | 21.0 – 50.9 | 0.86 | 0.79 – 1.05 |
| June | 22.1 | 17.5 – 29.9 | 0.76 | 0.72 – 0.84 |
| July | 19.2 | 15.4 – 26.1 | 0.75 | 0.72 – 0.83 |
| August | 17.5 | 14.9 – 21.3 | 0.73 | 0.71 – 0.79 |
| September | 17.4 | 14.7 – 20.8 | 0.73 | 0.70 – 0.76 |
| October | 18.8 | 14.7 – 29.5 | 0.72 | 0.68 – 0.80 |
| November | 25.4 | 16.9 – 39.8 | 0.77 | 0.68 – 0.92 |
| December | 30.5 | 17.1 – 52.7 | 0.84 | 0.70 – 0.99 |
Flow: median of daily means, 30 complete years from 1996 to 2025. Level: median of daily means, 10 complete years from 2016 to 2025.
Brantford 02GB001
Flow is typically highest in March (81.4 m³/s) and lowest in September (24.7 m³/s). Level is typically highest in January (0.83 m) and lowest in September (0.26 m).
| Month | Typical flow (m³/s) | Middle half of days | Typical level (m) | Middle half of days |
|---|---|---|---|---|
| January | 44.8 | 28.4 – 90.1 | 0.83 | 0.45 – 1.15 |
| February | 44.0 | 27.9 – 84.6 | 0.76 | 0.52 – 1.12 |
| March | 81.4 | 49.3 – 132 | 0.79 | 0.54 – 1.18 |
| April | 77.3 | 50.4 – 137 | 0.68 | 0.53 – 1.13 |
| May | 46.1 | 33.2 – 75.8 | 0.46 | 0.36 – 0.66 |
| June | 34.6 | 26.1 – 45.9 | 0.32 | 0.26 – 0.41 |
| July | 28.3 | 21.8 – 39.3 | 0.29 | 0.23 – 0.40 |
| August | 25.0 | 21.3 – 32.6 | 0.26 | 0.23 – 0.36 |
| September | 24.7 | 20.7 – 30.5 | 0.26 | 0.22 – 0.30 |
| October | 28.1 | 21.9 – 42.4 | 0.26 | 0.21 – 0.34 |
| November | 38.6 | 26.5 – 61.1 | 0.32 | 0.23 – 0.53 |
| December | 49.0 | 28.0 – 79.0 | 0.50 | 0.36 – 0.69 |
Flow: median of daily means, 30 complete years from 1996 to 2025. Level: median of daily means, 10 complete years from 2016 to 2025.
When does the spring peak come?
Computed from the agency's published daily means: for each year, the highest day between March 1 and July 31.
Galt (02GA003): over 30 complete years from 1996 to 2025, the highest daily flow between March and July came around March 31 (the median date). In 15 of those 30 years it came between March 17 and April 11. The median peak was 342 m³/s; the highest in the period, 780 m³/s, came on June 24, 2017.
Brantford (02GB001): over 30 complete years from 1996 to 2025, the highest daily flow between March and July came around April 1 (the median date). In 15 of those 30 years it came between March 17 and April 11. The median peak was 442 m³/s; the highest in the period, 782 m³/s, came on April 3, 2008.
About the gauges
Galt
- Station number
- 02GA003
- Official name
- GRAND RIVER AT GALT
- Agency
- Water Survey of Canada
- Operator
- Ontario Ministry of Natural Resources
- Drainage area
- 3,517 km²
- Level datum
- ASSUMED DATUM
Brantford
- Station number
- 02GB001
- Official name
- GRAND RIVER AT BRANTFORD
- Agency
- Water Survey of Canada
- Drainage area
- 5,201 km²
- Level datum
- ASSUMED DATUM
The federal Water Office site asks each new visitor to accept the site's terms before showing a report.
Canoe routes on the Grand River
Questions
What is the Grand River water level today?
The reading at the top of this page comes from Water Survey of Canada each time the page loads, for gauge 02GA003 (Galt). The table of typical values shows whether the reading is high or low for the season.
When does the Grand River peak in spring?
Galt (02GA003): over 30 complete years from 1996 to 2025, the highest daily flow between March and July came around March 31 (the median date). In 15 of those 30 years it came between March 17 and April 11. The median peak was 342 m³/s; the highest in the period, 780 m³/s, came on June 24, 2017.
Data source: Environment and Climate Change Canada (real-time readings and the HYDAT archive), end-use licence. CanoeMap computes the typical values and the peak dates from those archives.