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Map of Purdom Lake with depth contours

Purdom Lake

49.1526° N, 88.4217° W

Depth contours from the 1975 government survey. Not for navigation.

Download the depth map (SVG)

Purdom Lake, Ontario. 49.1526° N, 88.4217° W

Maximum depth 8.2 m (1975 survey). Scale bar on the map.

Not for navigation. Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/purdom-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.

Purdom Lake is 8.2 m deep at its deepest point, shallower than 76% of the 2,688 surveyed lakes in Ontario. It covers 2.62 km² and lies 4.9 km west of Cameron Falls.

Government surveys have recorded 8 fish species here, including yellow perch, smallmouth bass and brook trout.

Maximum depth
8.2 msurveyed 1975
shallower than 76% of the 2,688 surveyed lakes in Ontario
Area
2.62 km²
larger than 85% of the 18,731 lakes in Ontario
Shoreline
14.3 km
longer than 82% of the 18,731 lakes in Ontario
Fish species
8
more than 69% of the 2,454 surveyed lakes in Ontario
Elevation
283 m

Today on the water

4.6 °C

Wind NW 2 km/h

Observed at Nipigon, as of 3:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 4 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Time4 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/hNW 15W 15N 10S 10S 15SE 20SE 30SE 30
Gusts km/h50
Waves (est.) m0.20.10.10.10.2
Temp. °C20410111097
Precip. %20000002020

Tonight: Cloudy. 40 percent chance of showers early this evening. Clearing near midnight. Wind north 20 km/h gusting to 40 becoming light late this evening. Low minus 1.

Weather: Nipigon (local forecast), as of 3:02 a.m. EDT

Sun and moon

Civil dawn
7:33 a.m.
Sunrise
8:05 a.m.
Sunset
7:15 p.m.
Civil dusk
7:47 p.m.
Moonrise
6:57 a.m.
Moonset
6:34 p.m.
Moon
Waning crescent, 1% lit

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Depth

46% of Purdom 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 1975 records a maximum depth of 8.2 m, drawn from 88 depth contours.

Not for navigation. Depths are from government surveys and may be outdated.

Fish

Sport fish by the share of the 33 government surveys (2008–2013) that recorded them.

  • Yellow Perch23 of 33
  • Smallmouth Bass21 of 33
  • Brook Trout9 of 33
  • Cisco3 of 33
Forage fish and other species (4)

Forage fish

  • Blacknose Shiner 2
  • Golden Shiner 1
  • Spottail Shiner 1

Other

  • White Sucker 33

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 2 species from Purdom Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Brook Trout30-35 cm1612Precautionary
Smallmouth Bass35-40 cm8Do not eatMercury

* 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 6. Check seasons and limits before you fish.