Chemainus River at Westholme
Water level and flow at gauge 08HA001, British Columbia. The flow is below normal for October (17% of the median). In the last 24 hours it has been rising.
Latest reading Oct 25, 8 AM local standard time (about an hour ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 75 years of monthly averages): 5.13 m³/s181 cfs – 17.1 m³/s602 cfs, median 9.78 m³/s345 cfs. Right now it is at 17% of the median.
February 1, 2020 · approved records 1988–2025 (HYDAT). Right now the flow is 0% of that record.
92% lower than on October 25, 2025 (21.1 m³/s745 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 74 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 with 60 percent chance of showers. Wind east 20 km/h except gusting to 50 near the Strait of Georgia this morning. High 11. UV index 1 or low.
Cloudy with 60 percent chance of showers. Wind northeast 20 km/h becoming northwest 20 after midnight. Low 6.
Clearing early in the morning. Wind northwest 20 km/h becoming light late in the afternoon. High 14. UV index 1 or low.
Cloudy periods. Low 7 except plus 2 inland.
Forecast for Duncan (11 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Bings CreekThe Mouth · 10 km | 1.41 m4.63 ft | Normal |
| Cowichan RiverDuncan · 12 km | 0.34 m1.12 ft | Below normal |
| Koksilah RiverCowichan Station · 17 km | 0.51 m1.67 ft | Very low |
| Nanaimo RiverCassidy · 25 km | 0.75 m2.47 ft | Very low |
| Cowichan RiverLake Cowichan · 26 km | 0.31 m1.00 ft | Very low |
| Cowichan LakeLake Cowichan · 27 km | 0.48 m1.58 ft | Very low |
About this gauge
Station: 08HA001 · Chemainus River Near Westholme
Location: 48.8784, -123.7046 · British Columbia
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 Chemainus River at Westholme today?
The latest reading (Oct 25, 8 AM, local standard time) is 0.65 m (2.12 ft) with a flow of 1.71 m³/s (60.4 cfs).
Is the Chemainus River at Westholme high right now?
The flow is below normal for October (17% of the median).
Is the Chemainus River rising or falling?
In the last 24 hours it has been rising.
What is the highest flow ever recorded on the Chemainus River at Westholme?
729 m³/s (25,744 cfs) on February 1, 2020, the highest instantaneous flow in the approved records of the Water Survey of Canada (1988–2025). Events after 2025 are not yet in the approved archive.
How does the Chemainus River at Westholme compare with a year ago?
The flow is 92% lower than on October 25, 2025 (21.1 m³/s (745 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 08HA001 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.