Map of Lac D'Alembert

Lac D'Alembert

48.3829° N, 79.0077° W

Shoreline and neighbouring water from open government data.

Download the map (SVG)

Lac D'Alembert covers 1.25 km², making it larger than 78% of the 29,407 lakes in Quebec. It lies 6.3 km north of Duprat.

Area
1.25 km²
larger than 78% of the 29,407 lakes in Quebec
Shoreline
10.2 km
longer than 78% of the 29,407 lakes in Quebec
Water clarity
1.1 mSecchi depth, 2025
less clear than 98% of the 805 monitored lakes in Quebec
Elevation
294 m

Today on the water

4.4 °C

Mostly CloudyWind NW 17 km/h

Observed at Rouyn-Noranda, as of 3:00 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
Time4 a.m.7 a.m.10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.
Wind km/hW 15W 15W 20NW 20NW 20W 10W 10var. 5
Gusts km/h404040
Waves (est.) m0.10.10.20.20.2
Temp. °C1137853-1
Precip. %03030300000

Tonight: Partly cloudy. 60 percent chance of showers this evening. Wind northwest 20 km/h gusting to 40 becoming light early this evening. Low plus 1.

Weather: Rouyn-Noranda (local forecast), as of 3:06 a.m. EDT

Sun and moon

Civil dawn
6:55 a.m.
Sunrise
7:27 a.m.
Sunset
6:38 p.m.
Civil dusk
7:09 p.m.
Moonrise
6:17 a.m.
Moonset
5:57 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.

Water

Trophic status from the latest monitoring: eutrophic.

Clarity was measured with a Secchi disk in 18 years between 2007 and 2025; the latest annual mean is 1.1 m.

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