Map of Lac Malfait with depth contours

Lac Malfait

47.9166° N, 70.534° W

Depth contours from the 1979 government survey. Not for navigation.

Download the depth map (SVG)

Lac Malfait is 41.9 m deep at its deepest point, deeper than 90% of the 1,506 surveyed lakes in Quebec. It covers 0.92 km² and lies 28 km east of Boilleau.

Maximum depth
41.9 msurveyed 1979
deeper than 90% of the 1,506 surveyed lakes in Quebec
Area
0.92 km²
larger than 73% of the 29,407 lakes in Quebec
Shoreline
7.8 km
longer than 73% of the 29,407 lakes in Quebec
Elevation
638 m

Today on the water

8.3 °C

Wind SSW 21 km/h

Observed at La Malbaie, as of 4:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 9 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
Time5 a.m.8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.
Wind km/hNW 10W 10W 20W 20W 20NW 20NW 20NW 20
Waves (est.) m0.10.10.20.20.2
Temp. °C649108544
Precip. %030303030000

Tonight: A few showers ending early this evening then partly cloudy with 30 percent chance of showers. Risk of a thunderstorm early this evening. Low plus 4.

Weather: La Malbaie (local forecast), as of 4:01 a.m. EDT

Sun and moon

Civil dawn
6:21 a.m.
Sunrise
6:52 a.m.
Sunset
6:05 p.m.
Civil dusk
6:36 p.m.
Moonrise
5:42 a.m.
Moonset
5:23 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 1979 records a maximum depth of 41.9 m, drawn from 22 depth contours.

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 Depths are from government surveys and may be outdated.