St. Marys River at Garden River
Water level and flow at gauge 02CA003, Ontario. The level is normal for October. In the last 24 hours it has been rising.
Latest reading Oct 25, 9 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 52 years of monthly averages): 23.83 m78.17 ft – 24.44 m80.20 ft, median 24.20 m79.40 ft.
January 5, 1979 · approved records 1976–2025 (HYDAT). Right now the level is 1.94 m6.37 ft below that record.
0.21 m0.69 ft higher than on October 25, 2025 (23.81 m78.11 ft)
approved daily mean (HYDAT)
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily water level
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
Cloudy. 30 percent chance of showers near noon. A few showers beginning near noon and ending this afternoon. Wind northwest 30 km/h. High 13. UV index 2 or low.
A few clouds. Increasing cloudiness after midnight. Wind becoming northwest 30 km/h gusting to 50 this evening. Low plus 4.
Clearing in the morning. Wind north 20 km/h becoming light in the morning. Wind becoming northwest 30 in the afternoon. High 8. UV index 3 or moderate.
Clear. Low minus 4.
Forecast for Sault Ste. Marie (15 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Root RiverSault Ste. Marie · 12 km | 11.55 m37.91 ft | Very low |
| Goulais RiverKirby'S Corner · 24 km | 2.89 m9.47 ft | Very low |
| Big Carp RiverSault Ste. Marie · 26 km | 2.48 m8.13 ft | Very low |
| Thessalon RiverPoplar Dale · 32 km | 1.82 m5.98 ft | Below normal |
| Goulais RiverSearchmont · 38 km | 7.29 m23.93 ft | Very low |
| Batchawana RiverBatchawana · 60 km | 2.12 m6.95 ft | Very low |
About this gauge
Station: 02CA003 · St. Marys River Near Garden River
Location: 46.5326, -84.1313 · 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 St. Marys River at Garden River today?
The latest reading (Oct 25, 9 AM, local standard time) is 24.02 m (78.80 ft).
Is the St. Marys River at Garden River high right now?
The level is normal for October.
Is the St. Marys River rising or falling?
In the last 24 hours it has been rising.
What is the highest water level ever recorded on the St. Marys River at Garden River?
25.96 m (85.17 ft) on January 5, 1979, the highest instantaneous level in the approved records of the Water Survey of Canada (1976–2025). Events after 2025 are not yet in the approved archive.
How does the St. Marys River at Garden River compare with a year ago?
The level is 0.21 m (0.69 ft) higher than on October 25, 2025 (23.81 m (78.11 ft), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02CA003 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.