Map of Lac Delage with depth contours

Lac Delage

46.9657° N, 71.404° W

Depth contours from the 1980 government survey. Not for navigation.

Download the depth map (SVG)

Lac Delage is 26.7 m deep at its deepest point, deeper than 78% of the 1,506 surveyed lakes in Quebec. It covers 0.51 km² and lies beside Lac-Delage.

Maximum depth
26.7 msurveyed 1980
deeper than 78% of the 1,506 surveyed lakes in Quebec
Area
0.51 km²
larger than 62% of the 29,407 lakes in Quebec
Shoreline
3 km
shorter than 61% of the 29,407 lakes in Quebec
Water clarity
3.8 mSecchi depth, 2024
clearer than 50% of the 805 monitored lakes in Quebec
Elevation
149 m

Today on the water

YELLOW ADVISORY - FROST · issued 4:39 a.m. EDT
Temperatures will drop to near the freezing mark overnight tonight.

Take preventative measures to protect cold-sensitive plants, trees, and crops.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to QCstorm@ec.gc.ca or post reports on social media using #QCStorm.

Official alert on weather.gc.ca · expires 8:39 p.m. EDT

5.8 °C

Mostly CloudyWind SW 8 km/h

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

calm Estimated waves, next 12 hours: up to 0.1 m. Around 6 a.m., wind from the west: the west shore is sheltered, waves build toward the east 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/hW 15W 20W 20W 20W 20W 20W 20W 20
Gusts km/h40404040
Waves (est.) m0.10.10.10.10.1
Temp. °C7810119521
Precip. %303030300000

Today: A mix of sun and cloud with 30 percent chance of showers. Wind becoming west 20 km/h gusting to 40 this morning. High 11. UV index 3 or moderate.

Weather: Vanier (local forecast), as of 5:02 a.m. EDT

Sun and moon

Civil dawn
6:24 a.m.
Sunrise
6:55 a.m.
Sunset
6:09 p.m.
Civil dusk
6:39 p.m.
Moonrise
5:45 a.m.
Moonset
5:27 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

47% of Lac Delage 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 from 1980 records a maximum depth of 26.7 m, drawn from 11 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 18 years between 2004 and 2024; the latest annual mean is 3.8 m.

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

Photos

Lac Delage 2023-04-10 (1)
Photo: Gabriel Picard, CC BY-SA 4.0, via Wikimedia Commons
Lac Delage 2023-04-10 (3)
Photo: Gabriel Picard, CC BY-SA 4.0, via Wikimedia Commons
Lac Delage at night, Quebec, Canada
Photo: Wilfredor, CC0, via Wikimedia Commons