Lac Cornu
45.9721° N, 74.3882° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Lac Cornu, Quebec. 45.9721° N, 74.3882° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/qc/lac-cornu-near-sainte-agathe-des-monts/, 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 Cornu covers 0.5 km², making it larger than 62% of the 29,407 lakes in Quebec. It lies beside Lac-Cornu.
- Area
- 0.5 km²
- larger than 62% of the 29,407 lakes in Quebec
- Shoreline
- 7.3 km
- longer than 72% 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
- 421 m
Today on the water
5 °C
Observed at Sainte-Agathe, as of 9:00 a.m. EDT
calm Estimated waves, next 12 hours: up to 0.1 m. Around 10 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.
| Time | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. | 7 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 10 | W 20 | W 20 | W 10 | W 10 | NW 10 | NW 10 | var. 5 |
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.1 | ||||
| Temp. °C | 9 | 9 | 8 | 6 | 3 | 1 | -1 | -2 |
| Precip. % | 40 | 40 | 40 | 0 | 0 | 0 | 0 | 0 |
Today: A mix of sun and cloud with 40 percent chance of showers. Wind becoming west 20 km/h near noon. High 9. UV index 3 or moderate.
Weather: Sainte-Agathe (local forecast), as of 9:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:36 a.m.
- Sunrise
- 7:06 a.m.
- Sunset
- 6:22 p.m.
- Civil dusk
- 6:52 p.m.
- Moonrise
- 5:57 a.m.
- Moonset
- 5:40 p.m.
- Moon
- Waning crescent, 1% lit
Depth
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 14 years between 2009 and 2025; the latest annual mean is 2.6 m.