Map of Lac Labrecque with depth contours

Lac Labrecque

48.6786° N, 71.5059° W

Depth contours from the 1973 government survey. Not for navigation.

Download the depth map (SVG)

Lac Labrecque is 29 m deep at its deepest point, deeper than 80% of the 1,506 surveyed lakes in Quebec. It covers 4.03 km² and lies beside Lac-Tommy.

Maximum depth
29 msurveyed 1973
deeper than 80% of the 1,506 surveyed lakes in Quebec
Area
4.03 km²
larger than 89% of the 29,407 lakes in Quebec
Shoreline
13.6 km
longer than 83% of the 29,407 lakes in Quebec
Water clarity
1.7 mSecchi depth, 2025
less clear than 90% of the 805 monitored lakes in Quebec
Elevation
132 m

Today on the water

7.3 °C

Observed at Alma, as of 1:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 4 a.m., wind from the west: the west shore is sheltered, waves build toward the east 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 20W 20W 20W 20W 20W 20W 20
Gusts km/h40404040404040
Waves (est.) m0.20.20.20.2
Temp. °C54578533
Precip. %4040404040303030

Tonight: Mainly cloudy with 40 percent chance of showers. Wind west 20 km/h gusting to 40 becoming light this evening. Low plus 4.

Weather: Alma (local forecast), as of 3:05 a.m. EDT

Sun and moon

Civil dawn
6:25 a.m.
Sunrise
6:57 a.m.
Sunset
6:08 p.m.
Civil dusk
6:39 p.m.
Moonrise
5:46 a.m.
Moonset
5:26 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

28% of Lac Labrecque is shallower than 3 m, and 43% is deeper than 10 m.

How to read it: the lake’s area is sorted from the shore to the deepest point. Where the curve is flat, large areas share one depth (flats and weed beds); where it drops, depth changes quickly (drop-offs).

The government depth survey from 1973 records a maximum depth of 29 m, drawn from 17 depth contours.

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 Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: eutrophic.

Clarity was measured with a Secchi disk in 18 years between 2007 and 2025; the latest annual mean is 1.7 m.

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