Map of Lac Écho with depth contours

Lac Écho

45.8873° N, 74.0232° W

Depth contours from the 2018 government survey. Not for navigation.

Download the depth map (SVG)

Lac Écho is 8.9 m deep at its deepest point, shallower than 78% of the 1,506 surveyed lakes in Quebec. It covers 1.65 km² and lies beside Lac-Écho.

Maximum depth
8.9 msurveyed 2018
shallower than 78% of the 1,506 surveyed lakes in Quebec
Area
1.65 km²
larger than 81% of the 29,407 lakes in Quebec
Shoreline
8 km
longer than 73% of the 29,407 lakes in Quebec
Water clarity
2.6 mSecchi depth, 2025
less clear than 75% of the 805 monitored lakes in Quebec
Elevation
231 m

Today on the water

6.3 °C

Partly CloudyWind SW 4 km/h

Observed at Saint-Jérôme, 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 10W 10W 20W 20W 20W 20W 10W 10
Gusts km/h404040
Waves (est.) m0.10.10.20.20.2
Temp. °C981012131064
Precip. %0004040000

Tonight: Partly cloudy. 40 percent chance of showers this evening. Wind west 20 km/h gusting to 40 becoming light this evening. Low 8.

Weather: Saint-Jérôme (local forecast), as of 3:03 a.m. EDT

Sun and moon

Civil dawn
6:35 a.m.
Sunrise
7:04 a.m.
Sunset
6:20 p.m.
Civil dusk
6:50 p.m.
Moonrise
5:55 a.m.
Moonset
5:39 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

92% of Lac Écho is shallower than 3 m, and 5% is deeper than 5 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 2018 records a maximum depth of 8.9 m, drawn from 50 depth contours.

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 Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: mesotrophic.

Clarity was measured with a Secchi disk in 7 years between 2010 and 2025; the latest annual mean is 2.6 m.

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