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Map of Brownlee Lake with depth contours

Brownlee Lake

46.3025° N, 83.4286° W

Depth contours from the 1970 government survey. Not for navigation.

Download the depth map (SVG)

Brownlee Lake, Ontario. 46.3025° N, 83.4286° W

Maximum depth 4.6 m (1970 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/brownlee-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.
  • 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).

Brownlee Lake is 4.6 m deep at its deepest point, shallower than 90% of the 2,688 surveyed lakes in Ontario. It covers 0.78 km² and lies 2.5 km west of Sowerby.

Maximum depth
4.6 msurveyed 1970
shallower than 90% of the 2,688 surveyed lakes in Ontario
Area
0.78 km²
larger than 62% of the 18,731 lakes in Ontario
Shoreline
4.7 km
shorter than 54% of the 18,731 lakes in Ontario
Water clarity
3.6 mSecchi depth, 2013
clearer than 52% of the 1,251 monitored lakes in Ontario
Elevation
208 m

Today on the water

10 °C

CloudyWind SSW 15 km/h

Observed at Blind River, as of 4:00 a.m. EDT

calm Estimated waves, next 12 hours: up to 0.1 m. Around 5 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Time5 a.m.8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.
Wind km/hNW 10NW 20NW 20NW 10var. 5var. 5SE 10E 10
Gusts km/h40
Waves (est.) m0.10.10.10.10.1
Temp. °C7711141614104
Precip. %30202000000

Tonight: Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm after midnight. Low 7.

Weather: Blind River (local forecast), as of 4:01 a.m. EDT

Sun and moon

Civil dawn
7:12 a.m.
Sunrise
7:42 a.m.
Sunset
6:58 p.m.
Civil dusk
7:28 p.m.
Moonrise
6:35 a.m.
Moonset
6:16 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

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 1970 records a maximum depth of 4.6 m, drawn from 3 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 2012 and 2013; the latest annual mean is 3.6 m.

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