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Map of Lac du Brochet with depth contours

Lac du Brochet

45.9584° N, 74.545° W

Depth contours from the 2013 government survey. Not for navigation.

Download the depth map (SVG)

Lac du Brochet, Quebec. 45.9584° N, 74.545° W

Maximum depth 10.2 m (2013 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/qc/lac-du-brochet-2/, compiled October 9, 2026

  • Canadian Geographical Names Database, Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada.
  • HydroLAKES v1.0, Messager et al. 2016 / WWF HydroSHEDS. Licensed under CC BY 4.0.
  • Census boundaries and population, 2021, Statistics Canada. Adapted from Statistics Canada. This does not constitute an endorsement by Statistics Canada.
  • Géobase des bathymétries de lac du Québec (GBLQ), Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs. Licensed under CC BY 4.0. Source: Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP), Données Québec.
  • États trophiques des lacs (RSVL), Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs. Licensed under CC BY 4.0. Source: Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP), Données Québec.
  • City page weather forecasts and alerts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).

Lac du Brochet is 10.2 m deep at its deepest point, shallower than 74% of the 1,506 surveyed lakes in Quebec. It covers 0.16 km² and lies 1.3 km north of Weir.

Maximum depth
10.2 msurveyed 2013
shallower than 74% of the 1,506 surveyed lakes in Quebec
Area
0.16 km²
smaller than 75% of the 29,407 lakes in Quebec
Shoreline
2.1 km
shorter than 80% of the 29,407 lakes in Quebec
Water clarity
3.6 mSecchi depth, 2024
less clear than 54% of the 805 monitored lakes in Quebec
Elevation
188 m

Today on the water

4 °C

Wind calm

Observed at Sainte-Agathe, as of 4:00 a.m. EDT

calm Estimated waves, next 12 hours: up to 0.1 m. Around 5 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Time5 a.m.8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.
Wind km/hW 10W 10W 10W 20W 20W 10W 10NW 10
Waves (est.) m0.10.10.10.10.1
Temp. °C668108520
Precip. %6040404040000

Tonight: Partly cloudy with 60 percent chance of showers. Wind west 20 km/h becoming light this evening. Low 6.

Weather: Sainte-Agathe (local forecast), as of 4:02 a.m. EDT

Sun and moon

Civil dawn
6:37 a.m.
Sunrise
7:07 a.m.
Sunset
6:22 p.m.
Civil dusk
6:52 p.m.
Moonrise
5:57 a.m.
Moonset
5:41 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 du Brochet 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 2013 records a maximum depth of 10.2 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 8 years between 2008 and 2024; the latest annual mean is 3.6 m.

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