Shelter Valley Brook at Grafton
Water level and flow at gauge 02HD010, Ontario. The flow is below normal for October (72% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 9 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 61 years of monthly averages): 0.48 m³/s16.9 cfs – 0.67 m³/s23.8 cfs, median 0.58 m³/s20.5 cfs. Right now it is at 72% of the median.
March 21, 1980 · approved records 1967–2025 (HYDAT). Right now the flow is 1% of that record.
4% higher than on October 25, 2025 (0.40 m³/s14.2 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 60 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
Mainly sunny. Fog patches dissipating this morning. High 16. UV index 3 or moderate.
Clear. Becoming partly cloudy this evening. Low 9.
Cloudy. 30 percent chance of showers in the morning and early in the afternoon. High 15. UV index 2 or low.
Cloudy periods. Low minus 3.
Forecast for Cobourg (13 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Baltimore CreekBaltimore · 12 km | 1.34 m4.39 ft | Very low |
| Cobourg BrookCobourg · 15 km | 6.42 m21.05 ft | Below normal |
| Cobourg BrookPrecious Corners · 17 km | 2.26 m7.41 ft | Very high |
| Proctors CreekBrighton · 22 km | 1.07 m3.51 ft | Very low |
| Cold CreekOrland · 23 km | 2.58 m8.47 ft | Very low |
| Burnley CreekAbove Warkworth · 24 km | 2.51 m8.25 ft | Very low |
About this gauge
Station: 02HD010 · Shelter Valley Brook Near Grafton
Location: 43.9919, -78.0012 · 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 Shelter Valley Brook at Grafton today?
The latest reading (Oct 25, 9 AM, local standard time) is 0.74 m (2.44 ft) with a flow of 0.42 m³/s (14.8 cfs).
Is the Shelter Valley Brook at Grafton high right now?
The flow is below normal for October (72% of the median).
Is the Shelter Valley Brook rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Shelter Valley Brook at Grafton?
74.9 m³/s (2,645 cfs) on March 21, 1980, the highest instantaneous flow in the approved records of the Water Survey of Canada (1967–2025). Events after 2025 are not yet in the approved archive.
How does the Shelter Valley Brook at Grafton compare with a year ago?
The flow is 4% higher than on October 25, 2025 (0.40 m³/s (14.2 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02HD010 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.