Cirrus Lake
48.6247° N, 91.9131° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Cirrus Lake, Ontario. 48.6247° N, 91.9131° W
Maximum depth 88 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/cirrus-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.
- 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Cirrus Lake is 88 m deep at its deepest point, deeper than 99% of the 2,688 surveyed lakes in Ontario. It covers 22.2 km² and lies 15 km southeast of Flanders.
Government surveys have recorded 11 fish species here, including walleye, yellow perch and lake trout.
- Maximum depth
- 88 m
- deeper than 99% of the 2,688 surveyed lakes in Ontario
- Area
- 22.2 km²
- larger than 98% of the 18,731 lakes in Ontario
- Shoreline
- 119 km
- longer than 98% of the 18,731 lakes in Ontario
- Fish species
- 11
- more than 77% of the 2,454 surveyed lakes in Ontario
- Elevation
- 374 m
Today on the water
0.4 °C
Observed at Atikokan, as of 8:00 a.m. EST
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 7 p.m., wind from the southeast: the southeast shore is sheltered, waves build toward the northwest shore.
| Time | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. | 3 a.m. | 6 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | var. 5 | var. 5 | SE 10 | SE 10 | SE 20 | SE 20 | SE 20 | SE 20 |
| Gusts km/h | 40 | 40 | 40 | 40 | ||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.1 | ||||
| Temp. °C | 4 | 11 | 15 | 13 | 10 | 8 | 9 | 10 |
| Precip. % | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Today: Increasing cloudiness this morning. Wind up to 15 km/h. High 16. Wind chill minus 4 this morning. UV index 3 or moderate.
Weather: Atikokan (local forecast), as of 8:03 a.m. EST
Sun and moon
- Civil dawn
- 6:47 a.m.
- Sunrise
- 7:18 a.m.
- Sunset
- 6:29 p.m.
- Civil dusk
- 7:01 p.m.
- Moonrise
- 6:12 a.m.
- Moonset
- 5:48 p.m.
- Moon
- Waning crescent, 1% lit
Depth
8% of Cirrus Lake is shallower than 3 m, and 5% is deeper than 50 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 records a maximum depth of 88 m, drawn from 2,206 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 21 government surveys (2010–2010) that recorded them.
Forage fish and other species (2)
Forage fish
- Emerald Shiner 5
Other
- White Sucker 3
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 7 species from Cirrus Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 8 | Do not eat | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 12 | Precautionary |
| 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 | Do not eat | Mercury |
| Burbot (Ling) | 50-55 cm | 4 | Do not eat | Mercury |
| White Sucker | 45-50 cm | 16 | 12 | 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 5. Check seasons and limits before you fish.