Le Grou Lake
45.8516° N, 79.9109° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Le Grou Lake, Ontario. 45.8516° N, 79.9109° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/le-grou-lake/, 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.
- Fishing access points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Fisheries Management Zones, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Lake Partner Program, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
- 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Le Grou Lake covers 1.33 km², making it larger than 73% of the 18,731 lakes in Ontario. It lies 7 km southeast of Arnstein.
- Area
- 1.33 km²
- larger than 73% of the 18,731 lakes in Ontario
- Shoreline
- 15.6 km
- longer than 84% of the 18,731 lakes in Ontario
- Water clarity
- 2.4 mSecchi depth, 2025
- less clear than 77% of the 1,251 monitored lakes in Ontario
- Elevation
- 244 m
Today on the water
9.8 °C
Observed at Dunchurch, as of 7:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 8 a.m. | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 a.m. | 5 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.2 | 0.2 | 0.1 | |||
| Temp. °C | 6 | 9 | 13 | 14 | 8 | 4 | 2 | 1 |
| Precip. % | 30 | 30 | 20 | 20 | 0 | 0 | 0 | 0 |
Today: A mix of sun and cloud. 60 percent chance of showers this morning. Risk of a thunderstorm early this morning. Wind becoming northwest 30 km/h gusting to 50 near noon. High 14. UV index 4 or moderate.
Weather: Dunchurch (local forecast), as of 7:01 a.m. EDT
Sun and moon
- Civil dawn
- 6:58 a.m.
- Sunrise
- 7:28 a.m.
- Sunset
- 6:44 p.m.
- Civil dusk
- 7:14 p.m.
- Moonrise
- 6:20 a.m.
- Moonset
- 6:03 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Parry Sound, as of 7:00 a.m. EDT
Water
Clarity was measured with a Secchi disk in 23 years between 2002 and 2025; the latest annual mean is 2.4 m.
Getting on the water
1 listed boat launch; 1 with parking listed. marks launches on the map.
- Boat launch