Map of Lac Maclure with depth contours

Lac Maclure

48.4661° N, 69.8033° W

Depth contours from the 1983 government survey. Not for navigation.

Download the depth map (SVG)

Lac Maclure is 63.1 m deep at its deepest point, deeper than 97% of the 1,506 surveyed lakes in Quebec. It covers 1.52 km² and lies 22 km north of Rivière-Sainte-Marguerite.

Maximum depth
63.1 msurveyed 1983
deeper than 97% of the 1,506 surveyed lakes in Quebec
Area
1.52 km²
larger than 80% of the 29,407 lakes in Quebec
Shoreline
12.3 km
longer than 82% of the 29,407 lakes in Quebec
Water clarity
5.1 mSecchi depth, 2010
clearer than 73% of the 805 monitored lakes in Quebec
Elevation
286 m

Today on the water

7.3 °C

Wind WSW 5 km/h

Observed at Escoumins, as of 5:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 6 a.m., wind from the southwest: the southwest shore is sheltered, waves build toward the northeast shore.

Hourly forecast, next 24 hours
Time6 a.m.9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.3 a.m.
Wind km/hSW 15W 20W 20W 20W 20W 20NW 30NW 30
Gusts km/h40404040405050
Waves (est.) m0.20.10.10.10.1
Temp. °C67997666
Precip. %0030300000

Today: A mix of sun and cloud. 30 percent chance of showers this afternoon. Wind becoming west 20 km/h gusting to 40 this morning. High 10. UV index 3 or moderate.

Weather: Escoumins (local forecast), as of 5:03 a.m. EDT

Sun and moon

Civil dawn
6:18 a.m.
Sunrise
6:50 a.m.
Sunset
6:01 p.m.
Civil dusk
6:33 p.m.
Moonrise
5:39 a.m.
Moonset
5:19 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

12% of Lac Maclure is shallower than 3 m, and 17% is deeper than 30 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 1983 records a maximum depth of 63.1 m, drawn from 57 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 Depths are from government surveys and may be outdated.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 3 years between 2008 and 2010; the latest annual mean is 5.1 m.

Water clarity (Secchi depth, m)