Cassels Lake
47.0693° N, 79.7193° W
Depth contours from the 1971 government survey. Not for navigation.
Download the depth map (SVG)Cassels Lake, Ontario. 47.0693° N, 79.7193° W
Maximum depth 30.5 m (1971 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/cassels-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.
- Lake Partner Program, Ontario Ministry of the Environment, Conservation and Parks. 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.
- Ontario Waterbody Location Identifier, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
Cassels Lake is 30.5 m deep at its deepest point, deeper than 79% of the 2,688 surveyed lakes in Ontario. It covers 7.54 km² and lies 2.7 km east of Temagami.
Government surveys have recorded 21 fish species here, including cisco, walleye and lake whitefish.
- Maximum depth
- 30.5 msurveyed 1971
- deeper than 79% of the 2,688 surveyed lakes in Ontario
- Area
- 7.54 km²
- larger than 94% of the 18,731 lakes in Ontario
- Shoreline
- 45.7 km
- longer than 95% of the 18,731 lakes in Ontario
- Water clarity
- 3.7 mSecchi depth, 2004
- clearer than 56% of the 1,251 monitored lakes in Ontario
- Fish species
- 21
- more than 97% of the 2,454 surveyed lakes in Ontario
- Elevation
- 285 m
Today on the water
5.3 °C
Observed at Temiskaming Shores, as of 9:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 10 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 10 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/h | NW 15 | NW 20 | NW 20 | NW 20 | var. 5 | SE 10 | SE 10 | SE 10 |
| Gusts km/h | 40 | 40 | 40 | |||||
| Waves (est.) m | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | |||
| Temp. °C | 5 | 9 | 10 | 7 | 3 | 1 | -1 | -1 |
| Precip. % | 30 | 30 | 20 | 0 | 0 | 0 | 0 | 0 |
Today: Cloudy with 30 percent chance of showers this morning and early this afternoon then a mix of sun and cloud. Wind becoming northwest 20 km/h gusting to 40 late this morning. High 10. UV index 2 or low.
Weather: Temiskaming Shores (local forecast), as of 9:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:58 a.m.
- Sunrise
- 7:28 a.m.
- Sunset
- 6:42 p.m.
- Civil dusk
- 7:13 p.m.
- Moonrise
- 6:20 a.m.
- Moonset
- 6:01 p.m.
- Moon
- Waning crescent, 1% lit
Depth
45% of Cassels Lake is deeper than 10 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 1971 records a maximum depth of 30.5 m, drawn from 25 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 58 government surveys (2009–2014) that recorded them.
Forage fish and other species (11)
Forage fish
- Trout-Perch 8
- Common Shiner 6
- Logperch 6
- Bluntnose Minnow 5
- Emerald Shiner 5
- Spottail Shiner 4
- Spoonhead Sculpin 3
- Central Mudminnow 1
- Creek Chub 1
Other
- White Sucker 20
- Brown Bullhead 1
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 10 species from Cassels Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 4 | Do not eat | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 8 | Mercury |
| Northern Pike | 55-60 cm | 8 | Do not eat | Mercury |
| Rock Bass | 15-20 cm | 16 | 4 | Mercury |
| Smallmouth Bass | 35-40 cm | 4 | Do not eat | Mercury |
| Walleye | 40-45 cm | 4 | Do not eat | Mercury |
| Brown Bullhead | 30-35 cm | 16 | 8 | Mercury |
| Burbot (Ling) | 40-45 cm | 4 | Do not eat | Mercury |
| Cisco (Lake Herring) | 30-35 cm | 16 | 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 11. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 2 years between 2003 and 2004; the latest annual mean is 3.7 m.
Getting on the water
2 listed boat launches; 2 with parking listed. marks launches on the map.
South shore
- Boat launch
Southwest shore
- Cassels Lake North Shore Access Point