Map of Lac Dufresnoy with depth contours

Lac Dufresnoy

48.423° N, 78.9852° W

Depth contours from the 1963 government survey. Not for navigation.

Download the depth map (SVG)

Lac Dufresnoy is 7.3 m deep at its deepest point, shallower than 84% of the 1,506 surveyed lakes in Quebec. It covers 13.5 km² and lies 1.5 km southeast of Reneault.

Maximum depth
7.3 msurveyed 1963
shallower than 84% of the 1,506 surveyed lakes in Quebec
Area
13.5 km²
larger than 96% of the 29,407 lakes in Quebec
Shoreline
52.2 km
longer than 95% of the 29,407 lakes in Quebec
Water clarity
0.7 mSecchi depth, 2024
less clear than 100% of the 805 monitored lakes in Quebec
Elevation
274 m

Today on the water

4.4 °C

Mostly CloudyWind NW 17 km/h

Observed at Rouyn-Noranda, as of 3:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.3 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Hourly forecast, next 24 hours
Time4 a.m.7 a.m.10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.
Wind km/hW 15W 15W 20NW 20NW 20W 10W 10var. 5
Gusts km/h404040
Waves (est.) m0.20.20.20.3
Temp. °C1137853-1
Precip. %03030300000

Tonight: Partly cloudy. 60 percent chance of showers this evening. Wind northwest 20 km/h gusting to 40 becoming light early this evening. Low plus 1.

Weather: Rouyn-Noranda (local forecast), as of 3:06 a.m. EDT

Sun and moon

Civil dawn
6:55 a.m.
Sunrise
7:27 a.m.
Sunset
6:38 p.m.
Civil dusk
7:09 p.m.
Moonrise
6:17 a.m.
Moonset
5:56 p.m.
Moon
Waning crescent, 1% lit

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Depth

The government depth survey from 1963 records a maximum depth of 7.3 m, drawn from 12 depth contours.

Not for navigation. Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: hypereutrophic.

Clarity was measured with a Secchi disk in 4 years between 2012 and 2024; the latest annual mean is 0.7 m.

Water clarity (Secchi depth, m)
Total phosphorus (µg/L)