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Map of Lac Berthier with depth contours

Lac Berthier

46.2655° N, 73.4652° W

Depth contours from the 2010 government survey. Not for navigation.

Download the depth map (SVG)

Lac Berthier, Quebec. 46.2655° N, 73.4652° W

Maximum depth 8.8 m (2010 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/qc/lac-berthier-near-saint-gabriel/, 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 Berthier is 8.8 m deep at its deepest point, shallower than 79% of the 1,506 surveyed lakes in Quebec. It covers 0.34 km² and lies 6.8 km southwest of Saint-Gabriel.

Maximum depth
8.8 msurveyed 2010
shallower than 79% of the 1,506 surveyed lakes in Quebec
Area
0.34 km²
larger than 52% of the 29,407 lakes in Quebec
Shoreline
2.9 km
shorter than 62% of the 29,407 lakes in Quebec
Water clarity
2.9 mSecchi depth, 2025
less clear than 70% of the 805 monitored lakes in Quebec
Elevation
199 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

7.5 °C

Wind SW 5 km/h

Observed at Joliette, as of 7:00 a.m. EDT

calm Estimated waves, next 12 hours: up to 0.1 m. Around 8 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Time8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.5 a.m.
Wind km/hW 10W 20W 20W 20W 10W 10W 10NW 10
Gusts km/h404040
Waves (est.) m0.10.10.10.1
Temp. °C91113129640
Precip. %404040400000

Today: A mix of sun and cloud with 40 percent chance of showers. Risk of a thunderstorm this afternoon. Wind becoming west 20 km/h gusting to 40 this morning. High 13. UV index 3 or moderate.

Weather: Joliette (local forecast), as of 7:00 a.m. EDT

Sun and moon

Civil dawn
6:32 a.m.
Sunrise
7:03 a.m.
Sunset
6:18 p.m.
Civil dusk
6:48 p.m.
Moonrise
5:53 a.m.
Moonset
5:36 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

29% of Lac Berthier is shallower than 3 m, and 37% 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 2010 records a maximum depth of 8.8 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: mesotrophic.

Clarity was measured with a Secchi disk in 18 years between 2008 and 2025; the latest annual mean is 2.9 m.

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