Map of Lac Perreault with depth contours

Lac Perreault

46.8282° N, 72.2953° W

Depth contours from the 2012 government survey. Not for navigation.

Download the depth map (SVG)

Lac Perreault is 10.6 m deep at its deepest point, shallower than 72% of the 1,506 surveyed lakes in Quebec. It covers 0.35 km² and lies 2.4 km west of Lac-Blanc.

Maximum depth
10.6 msurveyed 2012
shallower than 72% of the 1,506 surveyed lakes in Quebec
Area
0.35 km²
larger than 53% of the 29,407 lakes in Quebec
Shoreline
4.2 km
longer than 55% of the 29,407 lakes in Quebec
Water clarity
2.3 mSecchi depth, 2025
less clear than 81% of the 805 monitored lakes in Quebec
Elevation
180 m

Today on the water

YELLOW ADVISORY - FROST · issued 4:39 a.m. EDT
Temperatures will drop to near the freezing mark overnight tonight.

Take preventative measures to protect cold-sensitive plants, trees, and crops.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to QCstorm@ec.gc.ca or post reports on social media using #QCStorm.

Official alert on weather.gc.ca · expires 8:39 p.m. EDT

3.8 °C

Wind calm

Observed at Donnacona, as of 7:00 a.m. EDT

calm Estimated waves, next 12 hours: up to 0.1 m. Around 8 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
Time8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.5 a.m.
Wind km/hW 15W 20W 20W 20W 20W 20W 20W 20
Gusts km/h404040
Waves (est.) m0.10.10.10.1
Temp. °C8911106303
Precip. %303030300000

Today: A mix of sun and cloud with 30 percent chance of showers. Wind becoming west 20 km/h gusting to 40 this morning. High 11. UV index 3 or moderate.

Weather: Donnacona (local forecast), as of 7:01 a.m. EDT

Sun and moon

Civil dawn
6:28 a.m.
Sunrise
6:58 a.m.
Sunset
6:13 p.m.
Civil dusk
6:43 p.m.
Moonrise
5:48 a.m.
Moonset
5:31 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 2012 records a maximum depth of 10.6 m, drawn from 10 depth contours.

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 Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: oligo-mesotrophic (transition).

Clarity was measured with a Secchi disk in 17 years between 2008 and 2025; the latest annual mean is 2.3 m.

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