Lac Saint-Pierre
47.4164° N, 69.8909° W
Depth contours from the 1979 government survey. Not for navigation.
Download the depth map (SVG)Lac Saint-Pierre, Quebec. 47.4164° N, 69.8909° W
Maximum depth 17 m (1979 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/qc/lac-saint-pierre-near-la-pocatiere/, 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 Saint-Pierre is 17 m deep at its deepest point, deeper than 52% of the 1,506 surveyed lakes in Quebec. It covers 0.56 km² and lies 3.3 km north of Saint-Gabriel-de-Kamouraska.
- Maximum depth
- 17 msurveyed 1979
- deeper than 52% of the 1,506 surveyed lakes in Quebec
- Area
- 0.56 km²
- larger than 64% of the 29,407 lakes in Quebec
- Shoreline
- 6.3 km
- longer than 68% of the 29,407 lakes in Quebec
- Water clarity
- 2.5 mSecchi depth, 2025
- less clear than 78% of the 805 monitored lakes in Quebec
- Elevation
- 137 m
Today on the water
8 °C
Observed at Kamouraska, as of 6:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 7 a.m., wind from the southwest: the southwest shore is sheltered, waves build toward the northeast shore.
| Time | 7 a.m. | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | SW 20 | W 20 | W 20 | W 20 | W 20 | W 20 | W 20 | W 20 |
| Gusts km/h | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
| Waves (est.) m | 0.2 | 0.1 | 0.1 | 0.1 | ||||
| Temp. °C | 7 | 7 | 8 | 7 | 7 | 6 | 5 | 5 |
| Precip. % | 0 | 30 | 30 | 30 | 0 | 0 | 0 | 0 |
Today: A mix of sun and cloud. 30 percent chance of showers late this morning and this afternoon. Wind west 20 km/h gusting to 40. Temperature steady near 8. UV index 3 or moderate.
Weather: Kamouraska (local forecast), as of 6:03 a.m. EDT
Sun and moon
- Civil dawn
- 6:18 a.m.
- Sunrise
- 6:49 a.m.
- Sunset
- 6:03 p.m.
- Civil dusk
- 6:33 p.m.
- Moonrise
- 5:39 a.m.
- Moonset
- 5:21 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
31% of Lac Saint-Pierre is shallower than 3 m, and 20% 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 1979 records a maximum depth of 17 m, drawn from 19 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: meso-eutrophic (transition).
Clarity was measured with a Secchi disk in 18 years between 2008 and 2025; the latest annual mean is 2.5 m.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.