Lac de l'Achigan
45.9382° N, 73.9632° W
Depth contours from the 2010 government survey. Not for navigation.
Download the depth map (SVG)Lac de l'Achigan, Quebec. 45.9382° N, 73.9632° W
Maximum depth 26.5 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 Depths are from government surveys and may be outdated.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-de-l-achigan-near-saint-jerome/, 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.
- Real-time hydrometric data, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- National Water Data Archive (HYDAT) daily means, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- 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).
- Air Quality Health Index observations and forecasts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
Lac de l'Achigan is 26.5 m deep at its deepest point, deeper than 77% of the 1,506 surveyed lakes in Quebec. It covers 5.26 km² and lies beside Lac-de-l'Achigan.
- Maximum depth
- 26.5 msurveyed 2010
- deeper than 77% of the 1,506 surveyed lakes in Quebec
- Area
- 5.26 km²
- larger than 92% of the 29,407 lakes in Quebec
- Shoreline
- 21.4 km
- longer than 89% of the 29,407 lakes in Quebec
- Water clarity
- 5.4 mSecchi depth, 2025
- clearer than 77% of the 805 monitored lakes in Quebec
- Elevation
- 205 m
Today on the water
7 °C
Observed at Saint-Sauveur, as of 4:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 12 p.m., wind from the west: the west shore is sheltered, waves build toward the east shore.
| Time | 5 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/h | W 10 | W 10 | W 10 | W 20 | W 20 | W 10 | W 10 | NW 10 |
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | |||
| Temp. °C | 6 | 6 | 8 | 10 | 8 | 5 | 2 | 0 |
| Precip. % | 60 | 40 | 40 | 40 | 40 | 0 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Wind west 20 km/h becoming light this evening. Low 6.
Weather: Saint-Sauveur (local forecast), as of 4:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:34 a.m.
- Sunrise
- 7:04 a.m.
- Sunset
- 6:20 p.m.
- Civil dusk
- 6:50 p.m.
- Moonrise
- 5:55 a.m.
- Moonset
- 5:38 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
9% of Lac de l'Achigan is shallower than 3 m, and 65% 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 2010 records a maximum depth of 26.5 m, drawn from 54 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
- Official government depth map (PDF)
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 16 years between 2010 and 2025; the latest annual mean is 5.4 m.
Follow this lake
Every Friday by email: the Environment Canada forecast, the water level at the nearest gauge and any weather alerts in effect.