Map of Lac Chapleau with depth contours

Lac Chapleau

46.2334° N, 74.9396° W

Depth contours from the 2014 government survey. Not for navigation.

Download the depth map (SVG)

Lac Chapleau is 56.8 m deep at its deepest point, deeper than 95% of the 1,506 surveyed lakes in Quebec. It covers 5.01 km² and lies beside Lac-Chapleau.

Maximum depth
56.8 msurveyed 2014
deeper than 95% of the 1,506 surveyed lakes in Quebec
Area
5.01 km²
larger than 91% of the 29,407 lakes in Quebec
Shoreline
28.1 km
longer than 91% of the 29,407 lakes in Quebec
Water clarity
7.4 mSecchi depth, 2025
clearer than 94% of the 805 monitored lakes in Quebec
Elevation
263 m

Today on the water

2 °C

Wind calm

Observed at Mont-Tremblant, as of 1:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m.

Hourly forecast, next 24 hours
Time2 a.m.5 a.m.8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.
Wind km/hW 10W 10W 10W 10W 20W 20W 10W 10
Waves (est.) m0.10.10.10.10.2
Temp. °C766810852
Precip. %60604040404000

Tonight: Partly cloudy with 60 percent chance of showers. Wind west 20 km/h becoming light this evening. Low 6.

Weather: Mont-Tremblant (local forecast), as of 1:01 a.m. EDT

Sun and moon

Civil dawn
6:38 a.m.
Sunrise
7:08 a.m.
Sunset
6:24 p.m.
Civil dusk
6:54 p.m.
Moonrise
5:59 a.m.
Moonset
5:42 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 2014 records a maximum depth of 56.8 m, drawn from 70 depth contours.

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 Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: oligotrophic.

Clarity was measured with a Secchi disk in 8 years between 2018 and 2025; the latest annual mean is 7.4 m.

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