Giroux Lake
45.7137° N, 80.504° W
Depth contours from the 2011 government survey. Not for navigation.
Download the depth map (SVG)Giroux Lake, Ontario. 45.7137° N, 80.504° W
Maximum depth 6 m (2011 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/giroux-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.
- Aquatic Resource Area survey points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- 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.
- Bathymetry lines and survey index, Ontario Ministry of Natural Resources. 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.
Giroux Lake is 6 m deep at its deepest point, shallower than 88% of the 2,688 surveyed lakes in Ontario. It covers 1.22 km² and lies 4.8 km southeast of Byng Inlet.
Government surveys have recorded 9 fish species here, including walleye, yellow perch and northern pike.
- Maximum depth
- 6 msurveyed 2011
- shallower than 88% of the 2,688 surveyed lakes in Ontario
- Area
- 1.22 km²
- larger than 72% of the 18,731 lakes in Ontario
- Shoreline
- 12.9 km
- longer than 80% of the 18,731 lakes in Ontario
- Fish species
- 9
- more than 69% of the 2,454 surveyed lakes in Ontario
- Elevation
- 181 m
Today on the water
9.8 °C
Observed at Dunchurch, as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 4 a.m. | 7 a.m. | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.3 | 0.3 | |||
| Temp. °C | 4 | 5 | 8 | 12 | 14 | 10 | 5 | 3 |
| Precip. % | 40 | 40 | 40 | 40 | 20 | 20 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 4.
Weather: Dunchurch (local forecast), as of 3:00 a.m. EDT
Sun and moon
- Civil dawn
- 7:00 a.m.
- Sunrise
- 7:30 a.m.
- Sunset
- 6:46 p.m.
- Civil dusk
- 7:16 p.m.
- Moonrise
- 6:22 a.m.
- Moonset
- 6:05 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
2 low risk
Parry Sound, as of 3:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
42% of Giroux Lake is shallower than 3 m.
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 2011 records a maximum depth of 6 m, drawn from 27 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
Not for navigation. Depths are from government surveys and may be outdated.
Fish
Sport fish by the share of the 16 government surveys (2011–2011) that recorded them.
Forage fish and other species (3)
Forage fish
- Golden Shiner 1
Other
- White Sucker 8
- Brown Bullhead 7
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 5 species from Giroux Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Northern Pike | 55-60 cm | 4 | Do not eat | Mercury |
| Smallmouth Bass | 35-40 cm | 8 | Do not eat | Mercury |
| Walleye | 40-45 cm | 8 | 4 | Mercury |
| Yellow Perch | 20-25 cm | 8 | 4 | Mercury |
| White Sucker | 40-45 cm | 16 | 16 | Precautionary |
* As defined in the guide, including children and people who are or may become pregnant. Limits are for the length the guide lists most often; they change with the size of the fish. Read the official guide
Fishing regulations: Fisheries Management Zone 15. Check seasons and limits before you fish.
Getting on the water
1 listed boat launch; 1 with parking listed. marks launches on the map.
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.