Devil Lake
44.5738° N, 76.4471° W
Depth contours from the 1971 government survey. Not for navigation.
Download the depth map (SVG)Devil Lake, Ontario. 44.5738° N, 76.4471° W
Maximum depth 42.7 m (1971 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/devil-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).
- 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.
Devil Lake is 42.7 m deep at its deepest point, deeper than 90% of the 2,688 surveyed lakes in Ontario. It covers 10.8 km² and lies beside Bedford Mills.
Government surveys have recorded 9 fish species here, including smallmouth bass, lake trout and bluegill.
- Maximum depth
- 42.7 msurveyed 1971
- deeper than 90% of the 2,688 surveyed lakes in Ontario
- Area
- 10.8 km²
- larger than 95% of the 18,731 lakes in Ontario
- Shoreline
- 67.9 km
- longer than 97% of the 18,731 lakes in Ontario
- Water clarity
- 5.2 mSecchi depth, 2025
- clearer than 83% of the 1,251 monitored lakes in Ontario
- Fish species
- 9
- more than 69% of the 2,454 surveyed lakes in Ontario
- Elevation
- 132 m
Today on the water
10.2 °C
Observed at Westport, 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 | 0.2 | 0.2 | 0.2 | 0.3 | ||||
| Temp. °C | 4 | 5 | 9 | 12 | 14 | 11 | 7 | 3 |
| Precip. % | 20 | 40 | 40 | 40 | 40 | 20 | 20 | 0 |
Tonight: Partly cloudy. 60 percent chance of showers this evening. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 4.
Weather: Westport (local forecast), as of 3:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:44 a.m.
- Sunrise
- 7:13 a.m.
- Sunset
- 6:31 p.m.
- Civil dusk
- 7:00 p.m.
- Moonrise
- 6:05 a.m.
- Moonset
- 5:50 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
2 low risk
Kingston, as of 2:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
26% of Devil Lake is deeper than 20 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 42.7 m, drawn from 68 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 7 government surveys (2008–2008) that recorded them.
Other species (1)
- Brown Bullhead 1
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 7 species from Devil Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Bluegill | 15-20 cm | 16 | 12 | Precautionary |
| Lake Trout | 50-55 cm | 16 | 4 | Mercury |
| Largemouth Bass | 30-35 cm | 8 | 4 | Mercury |
| Northern Pike | 55-60 cm | 16 | 8 | Mercury |
| Pumpkinseed | 15-20 cm | 16 | 16 | Precautionary |
| Smallmouth Bass | 35-40 cm | 8 | 4 | Mercury |
| Brown Bullhead | 25-30 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 18. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 29 years between 1996 and 2025; the latest annual mean is 5.2 m.
Getting on the water
2 listed boat launches. marks launches on the map.
Northeast shore
- Boat launch
East shore
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.