Le Gros Lac
46.8591° N, 72.1245° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Le Gros Lac, Quebec. 46.8591° N, 72.1245° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/qc/le-gros-lac/, 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.
- 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).
Le Gros Lac covers 0.67 km², making it larger than 68% of the 29,407 lakes in Quebec. It lies 11 km northeast of Lac-Blanc.
- Area
- 0.67 km²
- larger than 68% of the 29,407 lakes in Quebec
- Shoreline
- 3.9 km
- longer than 51% of the 29,407 lakes in Quebec
- Water clarity
- 5 mSecchi depth, 2025
- clearer than 71% of the 805 monitored lakes in Quebec
- Elevation
- 178 m
Today on the water
3.2 °C
Observed at Donnacona, 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.
| 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 15 | W 15 | W 20 | W 20 | W 20 | W 20 | W 20 | W 20 |
| Gusts km/h | 40 | 40 | 40 | |||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |||
| Temp. °C | 6 | 6 | 8 | 13 | 9 | 6 | 3 | 3 |
| Precip. % | 40 | 30 | 30 | 30 | 30 | 0 | 0 | 0 |
Tonight: A few showers ending early this evening then partly cloudy with 40 percent chance of showers. Risk of a thunderstorm early this evening. Wind southwest 20 km/h gusting to 40 becoming light this evening. Low plus 5.
Weather: Donnacona (local forecast), as of 4:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:27 a.m.
- Sunrise
- 6:58 a.m.
- Sunset
- 6:12 p.m.
- Civil dusk
- 6:42 p.m.
- Moonrise
- 5:48 a.m.
- Moonset
- 5:30 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Water
Trophic status from the latest monitoring: oligo-mesotrophic (transition).
Clarity was measured with a Secchi disk in 4 years between 2022 and 2025; the latest annual mean is 5 m.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.