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Map of Bass Lake with depth contours

Bass Lake

44.5713° N, 76.0708° W

Depth contours from the 1965 government survey. Not for navigation.

Download the depth map (SVG)

Bass Lake, Ontario. 44.5713° N, 76.0708° W

Maximum depth 24.4 m (1965 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/bass-lake-near-brockville/, 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).
  • Air Quality Health Index observations and forecasts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).

Bass Lake is 24.4 m deep at its deepest point, deeper than 70% of the 2,688 surveyed lakes in Ontario. It covers 0.99 km² and lies 4.1 km northeast of Lyndhurst.

Maximum depth
24.4 msurveyed 1965
deeper than 70% of the 2,688 surveyed lakes in Ontario
Area
0.99 km²
larger than 67% of the 18,731 lakes in Ontario
Shoreline
8.9 km
longer than 70% of the 18,731 lakes in Ontario
Water clarity
6.9 mSecchi depth, 2023
clearer than 95% of the 1,251 monitored lakes in Ontario
Elevation
112 m

Today on the water

10.9 °C

Wind SW 4 km/h, gusts 27

Observed at Gananoque, as of 2:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m.

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/hW 15W 15W 15NW 30NW 30NW 15var. 5var. 5
Gusts5050
Waves (est.) m0.10.10.10.2
Temp. °C66812141395
Precip. %204040404020200

Tonight: Partly cloudy. 60 percent chance of showers this evening. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 5.

Weather: Gananoque (local forecast), as of 2:03 a.m. EDT

Sun and moon

Civil dawn
6:42 a.m.
Sunrise
7:12 a.m.
Sunset
6:30 p.m.
Civil dusk
6:59 p.m.
Moonrise
6:03 a.m.
Moonset
5:48 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

2 low risk

Kingston, as of 1:00 a.m. EDT

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

49% of Bass 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 1965 records a maximum depth of 24.4 m, drawn from 17 depth contours.

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 Depths are from government surveys and may be outdated.

Water

Clarity was measured with a Secchi disk in 22 years between 1997 and 2023; the latest annual mean is 6.9 m.

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