Lac Marquette

48.8774° N, 73.8806° W

Lac Marquette, Quebec. 48.8774° N, 73.8806° W

Maximum depth 30.1 m (2018 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/qc/lac-marquette/, 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).

Lac Marquette is 30.1 m deep at its deepest point. It covers 9.58 km² and lies 45 km southwest of Poisson-Blanc, Quebec.

Today on the water

4 °C

Wind WNW 13 km/h

Observed at Gouin (Réservoir), as of 1:00 p.m. EDT

Wind from the west: the west shore is the sheltered side.

Hourly forecast, next 24 hours
Time	2 p.m.	5 p.m.	8 p.m.	11 p.m.	2 a.m.	5 a.m.	8 a.m.	11 a.m.
Wind km/h	NW 20	NW 20	W 20	W 15	W 10	W 10	var. 5	var. 5
Gusts km/h	40	40
Temp. °C	5	5	2	0	0	-2	0	5
Precip. %	30	30	30	30	0	0	0	0

Today: Mainly cloudy with 30 percent chance of showers. Wind northwest 20 km/h gusting to 40. High plus 5. UV index 3 or moderate.

Weather: Gouin (Réservoir) (local forecast), as of 1:03 p.m. EDT

The government depth survey from 2018 records a maximum depth of 30.1 m, drawn from 143 depth contours.

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 Depths are from government surveys and may be outdated.