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Map of Stewart Lake with depth contours

Stewart Lake

48.8989° N, 88.5373° W

Depth contours from the government survey. Not for navigation.

Download the depth map (SVG)

Stewart Lake, Ontario. 48.8989° N, 88.5373° W

Maximum depth 30.5 m. Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/stewart-lake-near-nipigon/, 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.
  • 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).

Stewart Lake is 30.5 m deep at its deepest point, deeper than 79% of the 2,688 surveyed lakes in Ontario. It covers 0.74 km² and lies 6.1 km northwest of Hurkett.

Maximum depth
30.5 m
deeper than 79% of the 2,688 surveyed lakes in Ontario
Area
0.74 km²
larger than 60% of the 18,731 lakes in Ontario
Shoreline
4.9 km
shorter than 52% of the 18,731 lakes in Ontario
Water clarity
3.1 mSecchi depth, 2019
less clear than 60% of the 1,251 monitored lakes in Ontario
Elevation
268 m

Today on the water

-1.3 °C

ClearWind WSW 6 km/hfeels like -4 °C

Observed at Dorion, as of 5:00 a.m. EDT

calm Estimated waves, next 12 hours: up to 0.1 m. Around 6 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Time6 a.m.9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.3 a.m.
Wind km/hW 10var. 5S 10S 10SE 10SE 20SE 20SE 20
Gusts km/h4040
Waves (est.) m0.10.10.10.10.1
Temp. °C029131211109
Precip. %00000000

Tonight: Partly cloudy. 40 percent chance of showers early this evening. Clearing near midnight. Wind northwest 20 km/h becoming light this evening. Low minus 1.

Weather: Dorion (local forecast), as of 5:07 a.m. EDT

Sun and moon

Civil dawn
7:34 a.m.
Sunrise
8:05 a.m.
Sunset
7:16 p.m.
Civil dusk
7:47 p.m.
Moonrise
6:58 a.m.
Moonset
6:35 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

63% of Stewart 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 records a maximum depth of 30.5 m, drawn from 10 depth contours.

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 Depths are from government surveys and may be outdated.

Water

Clarity was measured with a Secchi disk in 2 years between 2018 and 2019; the latest annual mean is 3.1 m.

Water clarity (Secchi depth, m)
Total phosphorus (µg/L)

Getting on the water

2 listed boat launches. marks launches on the map.