Map of Lac Noir with depth contours

Lac Noir

48.365° N, 68.2908° W

Depth contours from the government survey. Not for navigation.

Download the depth map (SVG)

Lac Noir is 24.7 m deep at its deepest point, deeper than 74% of the 1,506 surveyed lakes in Quebec. It covers 1.09 km² and lies 2.9 km southwest of Le Petit-Saint-Marcellin.

Maximum depth
24.7 m
deeper than 74% of the 1,506 surveyed lakes in Quebec
Area
1.09 km²
larger than 76% of the 29,407 lakes in Quebec
Shoreline
5.6 km
longer than 65% of the 29,407 lakes in Quebec
Water clarity
5.3 mSecchi depth, 2024
clearer than 75% of the 805 monitored lakes in Quebec
Elevation
301 m

Today on the water

7.3 °C

Wind SW 19 km/h

Observed at Rimouski, as of 6:00 a.m. EDT

calm Estimated waves, next 12 hours: up to 0.1 m. Around 7 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
Time7 a.m.10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.4 a.m.
Wind km/hW 20W 20W 20W 20W 20W 30W 30W 30
Gusts km/h4040404040505050
Waves (est.) m0.10.10.10.10.1
Temp. °C88987665
Precip. %03030300000

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

Weather: Rimouski (local forecast), as of 6:04 a.m. EDT

Sun and moon

Civil dawn
6:12 a.m.
Sunrise
6:44 a.m.
Sunset
5:55 p.m.
Civil dusk
6:27 p.m.
Moonrise
5:32 a.m.
Moonset
5:13 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

37% of Lac Noir is shallower than 3 m, and 23% 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 records a maximum depth of 24.7 m, drawn from 8 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 Depths are from government surveys and may be outdated.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 15 years between 2010 and 2024; the latest annual mean is 5.3 m.

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