Grand lac des Îles

46.7146° N, 73.504° W

Grand lac des Îles, Quebec. 46.7146° N, 73.504° W

Maximum depth 40.7 m (2018 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/qc/grand-lac-des-iles/, 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.
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).

Grand lac des Îles is 40.7 m deep at its deepest point. It covers 5.91 km² and lies 23 km east of Saint-Ignace-du-Lac, Quebec.

Today on the water

4.9 °C

Wind WNW 7 km/h

Observed at Saint-Michel-des-Saints, as of 9:00 a.m. EDT

Hourly forecast, next 24 hours
Time	11 a.m.	2 p.m.	5 p.m.	8 p.m.	11 p.m.	2 a.m.	5 a.m.	8 a.m.
Wind km/h	W 10	W 20	W 20	W 15	W 10	W 10	W 10	var. 5
Temp. °C	7	8	6	4	3	2	0	-1
Precip. %	30	30	30	0	0	0	0	0

Today: A mix of sun and cloud with 30 percent chance of showers. Wind becoming west 20 km/h near noon. High 8. UV index 3 or moderate.

Weather: Saint-Michel-des-Saints (local forecast), as of 10:05 a.m. EDT

The government depth survey from 2018 records a maximum depth of 40.7 m, drawn from 54 depth contours.

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 Depths are from government surveys and may be outdated.