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Map of Big Vermilion Lake with depth contours

Big Vermilion Lake

50.0448° N, 92.2083° W

Depth contours from the 1972 government survey. Not for navigation.

Download the depth map (SVG)

Big Vermilion Lake, Ontario. 50.0448° N, 92.2083° W

Maximum depth 39.6 m (1972 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/big-vermilion-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.
  • 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.
  • 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).

Big Vermilion Lake is 39.6 m deep at its deepest point, deeper than 88% of the 2,688 surveyed lakes in Ontario. It covers 69.4 km² and lies 1.8 km southwest of Hudson.

Maximum depth
39.6 msurveyed 1972
deeper than 88% of the 2,688 surveyed lakes in Ontario
Area
69.4 km²
larger than 99% of the 18,731 lakes in Ontario
Shoreline
181 km
longer than 99% of the 18,731 lakes in Ontario
Elevation
363 m

Today on the water

-1.2 °C

ClearWind calmfeels like -3 °C

Observed at Sioux Lookout, as of 2:00 a.m. CDT

choppy Estimated waves, next 12 hours: up to 0.3 m. Around 7 a.m., wind from the south: the south shore is sheltered, waves build toward the north shore.

Time3 a.m.6 a.m.9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.
Wind km/hvar. 5S 10S 20S 20SE 20SE 20SE 30SE 30
Gusts km/h405050
Waves (est.) m0.10.20.30.3
Temp. °C00510111197
Precip. %2020202060606010

Tonight: Partly cloudy. Becoming clear this evening. Wind northwest 30 km/h gusting to 50 becoming light this evening. Low minus 1.

Weather: Sioux Lookout (local forecast), as of 2:07 a.m. CDT

Sun and moon

Civil dawn
6:49 a.m.
Sunrise
7:21 a.m.
Sunset
6:29 p.m.
Civil dusk
7:02 p.m.
Moonrise
6:14 a.m.
Moonset
5:48 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

18% of Big Vermilion Lake is shallower than 3 m, and 24% 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 1972 records a maximum depth of 39.6 m, drawn from 275 depth contours.

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 Depths are from government surveys and may be outdated.

Getting on the water

2 listed boat launches; 2 with parking listed. marks launches on the map.

Northeast end

Northwest shore