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Map of Kopka Lake with depth contours

Kopka Lake

49.9918° N, 89.1509° W

Depth contours from the 1978 government survey. Not for navigation.

Download the depth map (SVG)

Kopka Lake, Ontario. 49.9918° N, 89.1509° W

Maximum depth 21 m (1978 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

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

Kopka Lake is 21 m deep at its deepest point, deeper than 61% of the 2,688 surveyed lakes in Ontario. It covers 11.5 km² and lies 33 km south of Armstrong.

Government surveys have recorded 2 fish species here: northern pike and yellow perch.

Maximum depth
21 msurveyed 1978
deeper than 61% of the 2,688 surveyed lakes in Ontario
Area
11.5 km²
larger than 96% of the 18,731 lakes in Ontario
Shoreline
18 km
longer than 86% of the 18,731 lakes in Ontario
Fish species
2
fewer than 60% of the 2,454 surveyed lakes in Ontario
Elevation
276 m

Today on the water

-0.8 °C

ClearWind calmfeels like -4 °C

Observed at Gull Bay, 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 west: the west shore is sheltered, waves build toward the east 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/hW 15W 10SW 10SE 10SE 15S 15S 20SE 30
Gusts km/h4050
Waves (est.) m0.20.10.10.1
Temp. °C4259121198
Precip. %2020202040404040

Tonight: Mainly cloudy. 30 percent chance of showers early this evening. Clearing near midnight. Wind north 20 km/h gusting to 40 becoming light this evening. Low plus 2.

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

Sun and moon

Civil dawn
7:36 a.m.
Sunrise
8:09 a.m.
Sunset
7:17 p.m.
Civil dusk
7:49 p.m.
Moonrise
7:01 a.m.
Moonset
6:36 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

32% of Kopka 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 from 1978 records a maximum depth of 21 m, drawn from 13 depth contours.

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 Depths are from government surveys and may be outdated.

Fish

Sport fish by the share of the 1 government surveys (2012–2012) that recorded them.

  • Northern Pike1 of 1
  • Yellow Perch1 of 1

Fishing regulations: Fisheries Management Zone 6. Check seasons and limits before you fish.

Getting on the water

2 listed boat launches. marks launches on the map.

Northeast shore

Southeast shore