Map of Lac à Beauce with depth contours

Lac à Beauce

47.3332° N, 72.755° W

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

Download the depth map (SVG)

Lac à Beauce is 33.1 m deep at its deepest point, deeper than 85% of the 1,506 surveyed lakes in Quebec. It covers 2.13 km² and lies beside Lac-à-Beauce.

Maximum depth
33.1 msurveyed 2012
deeper than 85% of the 1,506 surveyed lakes in Quebec
Area
2.13 km²
larger than 84% of the 29,407 lakes in Quebec
Shoreline
13.6 km
longer than 83% of the 29,407 lakes in Quebec
Water clarity
3.2 mSecchi depth, 2025
less clear than 63% of the 805 monitored lakes in Quebec
Elevation
205 m

Today on the water

6 °C

Wind WSW 3 km/h

Observed at La Tuque, as of 9:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 10 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Hourly forecast, next 24 hours
Time10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.4 a.m.7 a.m.
Wind km/hNW 20NW 20NW 20NW 20NW 20NW 20NW 20NW 15
Gusts km/h4040
Waves (est.) m0.20.20.20.2
Temp. °C79964321
Precip. %40404000000

Today: Mainly cloudy with 40 percent chance of showers. Wind becoming northwest 20 km/h gusting to 40 this morning. High 10. UV index 3 or moderate.

Weather: La Tuque (local forecast), as of 9:02 a.m. EDT

Sun and moon

Civil dawn
6:30 a.m.
Sunrise
7:01 a.m.
Sunset
6:14 p.m.
Civil dusk
6:45 p.m.
Moonrise
5:51 a.m.
Moonset
5:32 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

42% of Lac à Beauce 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 2012 records a maximum depth of 33.1 m, drawn from 67 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 Depths are from government surveys and may be outdated.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 19 years between 2007 and 2025; the latest annual mean is 3.2 m.

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