Lac O'Neil
46.4272° N, 70.8004° W
Depth contours from the 1977 government survey. Not for navigation.
Download the depth map (SVG)Lac O'Neil, Quebec. 46.4272° N, 70.8004° W
Maximum depth 5.5 m (1977 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/qc/lac-o-neil-near-sainte-marie/, 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).
- Air Quality Health Index observations and forecasts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
Lac O'Neil is 5.5 m deep at its deepest point, shallower than 90% of the 1,506 surveyed lakes in Quebec. It covers 0.16 km² and lies 8.6 km southeast of Springbrook.
- Maximum depth
- 5.5 msurveyed 1977
- shallower than 90% of the 1,506 surveyed lakes in Quebec
- Area
- 0.16 km²
- smaller than 75% of the 29,407 lakes in Quebec
- Shoreline
- 2.5 km
- shorter than 70% of the 29,407 lakes in Quebec
- Water clarity
- 2.7 mSecchi depth, 2024
- less clear than 74% of the 805 monitored lakes in Quebec
- Elevation
- 477 m
Today on the water
YELLOW ADVISORY - FROST · issued 11:24 a.m. EDT
Temperatures will drop near the freezing mark overnight tonight and overnight Saturday night. Take preventative measures to protect cold-sensitive plants, trees, and crops. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to QCstorm@ec.gc.ca or post reports on social media using #QCStorm.
Official alert on weather.gc.ca · expires 3:24 a.m. EDT Saturday
9.9 °C
Observed at Beauceville, as of 12:00 p.m. EDT
calm Estimated waves, next 12 hours: up to 0.1 m. Around 1 p.m., wind from the west: the west shore is sheltered, waves build toward the east shore.
| Time | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. | 7 a.m. | 10 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 20 | W 20 | W 20 | W 20 | W 20 | W 20 | W 10 | W 10 |
| Gusts km/h | 40 | 40 | 40 | 40 | 40 | 40 | ||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.1 | ||||
| Temp. °C | 10 | 10 | 7 | 5 | 3 | 1 | 1 | 5 |
| Precip. % | 40 | 40 | 0 | 0 | 0 | 0 | 0 | 0 |
Today: Mainly cloudy with 40 percent chance of showers. Wind west 20 km/h gusting to 40. High 11. UV index 3 or moderate.
Weather: Beauceville (local forecast), as of 12:04 p.m. EDT
Sun and moon
- Civil dawn
- 6:22 a.m.
- Sunrise
- 6:52 a.m.
- Sunset
- 6:07 p.m.
- Civil dusk
- 6:37 p.m.
- Moonrise
- 5:42 a.m.
- Moonset
- 5:25 p.m.
- Moon
- Waning crescent, 1% lit
Depth
How to read it: the lake’s area is sorted from the shore to the deepest point. Where the curve is flat, large areas share one depth (flats and weed beds); where it drops, depth changes quickly (drop-offs).
The government depth survey from 1977 records a maximum depth of 5.5 m, drawn from 9 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
- Official government depth map (PDF)
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 7 years between 2015 and 2024; the latest annual mean is 2.7 m.