Shamattawa River outlet of Shamattawa Lake
Water level and flow at gauge 04DC002, Ontario. The flow is normal for October (83% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 7 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 54 years of monthly averages): 32.7 m³/s1,156 cfs – 73.3 m³/s2,589 cfs, median 50.9 m³/s1,799 cfs. Right now it is at 83% of the median.
May 18, 2023 · approved records 1972–2025 (HYDAT). Right now the flow is 8% of that record.
43% lower than on October 25, 2025 (74.4 m³/s2,627 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 54 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.
Nearby gauges
| Ekwan RiverBelow North Washagami River · 72 km | 22.60 m74.16 ft | Below normal |
| Winisk RiverBelow Asheweig River Tributary · 105 km | 21.79 m71.50 ft | Below normal |
| Attawapiskat RiverBelow Muketei River · 139 km | 22.80 m74.81 ft | Very low |
| Muketei RiverOtoskwin-Attawapiskat River Provincial Park · 163 km | 12.27 m40.27 ft | Very low |
| Asheweig RiverStraight Lake · 164 km | 13.19 m43.28 ft | Very low |
| Attawapiskat RiverAbove Lawashi Channel · 213 km | 5.62 m18.44 ft | Very low |
About this gauge
Station: 04DC002 · Shamattawa River at Outlet of Shamattawa Lake
Location: 54.2898, -85.6515 · 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 Shamattawa River outlet of Shamattawa Lake today?
The latest reading (Oct 25, 7 AM, local standard time) is 27.33 m (89.66 ft) with a flow of 42.3 m³/s (1,494 cfs).
Is the Shamattawa River outlet of Shamattawa Lake high right now?
The flow is normal for October (83% of the median).
Is the Shamattawa River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Shamattawa River outlet of Shamattawa Lake?
532 m³/s (18,787 cfs) on May 18, 2023, the highest instantaneous flow in the approved records of the Water Survey of Canada (1972–2025). Events after 2025 are not yet in the approved archive.
How does the Shamattawa River outlet of Shamattawa Lake compare with a year ago?
The flow is 43% lower than on October 25, 2025 (74.4 m³/s (2,627 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 04DC002 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.