River Denys at Big Marsh
Water level and flow at gauge 01FG001, Nova Scotia. The flow is normal for October (81% of the median). In the last 24 hours it has been falling.
Latest reading Oct 25, 8 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 19 years of monthly averages): 0.40 m³/s14.1 cfs – 1.06 m³/s37.6 cfs, median 0.91 m³/s32.1 cfs. Right now it is at 81% of the median.
July 22, 2023 · approved records 2006–2024 (HYDAT). Right now the flow is 3% of that record.
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily flow
Normal range: monthly averages of 20 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
Sunny. Wind west 20 km/h. High 16. UV index 3 or moderate.
Clear. Wind west 20 km/h gusting to 40. Low 7.
Sunny. Becoming a mix of sun and cloud in the afternoon. Wind southwest 20 km/h gusting to 40. High 16. UV index 3 or moderate.
Cloudy periods with 30 percent chance of showers. Low plus 5.
Forecast for Port Hawkesbury (33 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| River InhabitantsGlenora · 20 km | 1.13 m3.70 ft | Normal |
| Southwest Margaree RiverUpper Margaree · 37 km | 0.95 m3.11 ft | Normal |
| Middle RiverMaclennans Cross · 39 km | 1.18 m3.86 ft | Very high |
| Northeast Margaree RiverMargaree Valley · 56 km | 0.42 m1.37 ft | Normal |
| Ingram BrookRivulet · 57 km | 96.27 m315.83 ft | No normal yet |
| South RiverSt. Andrews · 66 km | 1.40 m4.60 ft | Above normal |
About this gauge
Station: 01FG001 · River Denys at Big Marsh
Location: 45.8937, -61.2048 · Nova Scotia
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 River Denys at Big Marsh today?
The latest reading (Oct 25, 8 AM, local standard time) is 1.90 m (6.24 ft) with a flow of 0.74 m³/s (26.1 cfs).
Is the River Denys at Big Marsh high right now?
The flow is normal for October (81% of the median).
Is the River Denys rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the River Denys at Big Marsh?
26.0 m³/s (918 cfs) on July 22, 2023, the highest instantaneous flow in the approved records of the Water Survey of Canada (2006–2024). Events after 2024 are not yet in the approved archive.
Where does this data come from?
Gauge 01FG001 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.