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Lac Joncas

47.116° N, 77.6633° W

Lac Joncas, Quebec. 47.116° N, 77.6633° 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 Depths are from government surveys and may be outdated.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-joncas/, 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 Joncas is 30.1 m deep at its deepest point. It covers 4.47 km² and lies 56 km southwest of Dorval-Lodge, Quebec.

Maximum depth
30.1 msurveyed 2018
Area
4.47 km²
Shoreline
25.9 km
Elevation
321 m

Today on the water

3.7 °C

Mostly CloudyWind W 9 km/h

Observed at La Vérendrye (Réserve faunique), as of 9:00 a.m. EDT

Time10 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/hNW 15NW 20NW 20NW 15NW 10var. 5var. 5var. 5
Temp. °C6786420-1
Precip. %30303000000

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

Weather: La Vérendrye (Réserve faunique) (local forecast), as of 9:01 a.m. EDT

Sun and moon

Civil dawn
6:50 a.m.
Sunrise
7:20 a.m.
Sunset
6:34 p.m.
Civil dusk
7:04 p.m.
Moonrise
6:11 a.m.
Moonset
5:52 p.m.
Moon
Waning crescent, 1% lit

Depth

The government depth survey from 2018 records a maximum depth of 30.1 m, drawn from 243 depth contours.

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 Depths are from government surveys and may be outdated.