Macdonald Lake
45.2364° N, 78.5592° W
Depth contours from the 1968 government survey. Not for navigation.
Download the depth map (SVG)Macdonald Lake, Ontario. 45.2364° N, 78.5592° W
Maximum depth 39.6 m (1968 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/macdonald-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).
- 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).
Macdonald Lake is 39.6 m deep at its deepest point, deeper than 88% of the 2,688 surveyed lakes in Ontario. It covers 1.4 km² and lies 12 km west of Fort Irwin.
- Maximum depth
- 39.6 msurveyed 1968
- deeper than 88% of the 2,688 surveyed lakes in Ontario
- Area
- 1.4 km²
- larger than 74% of the 18,731 lakes in Ontario
- Shoreline
- 9.6 km
- longer than 73% of the 18,731 lakes in Ontario
- Water clarity
- 8.5 mSecchi depth, 2015
- clearer than 98% of the 1,251 monitored lakes in Ontario
- Elevation
- 379 m
Today on the water
5 °C
Observed at Oxtongue Lake, as of 8:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 9 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.
| Time | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. | 3 a.m. | 6 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | |||
| Temp. °C | 5 | 9 | 12 | 11 | 6 | 1 | -2 | -2 |
| Precip. % | 40 | 40 | 20 | 20 | 0 | 0 | 0 | 0 |
Today: A mix of sun and cloud. 40 percent chance of showers this morning and early this afternoon. Wind becoming northwest 30 km/h gusting to 50 near noon. High 13. UV index 4 or moderate.
Weather: Oxtongue Lake (local forecast), as of 8:03 a.m. EDT
Sun and moon
- Civil dawn
- 6:53 a.m.
- Sunrise
- 7:22 a.m.
- Sunset
- 6:39 p.m.
- Civil dusk
- 7:09 p.m.
- Moonrise
- 6:14 a.m.
- Moonset
- 5:58 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Dorset, as of 8:00 a.m. EDT
Depth
21% of Macdonald Lake is shallower than 3 m, and 13% 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 1968 records a maximum depth of 39.6 m, drawn from 21 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
Not for navigation. Depths are from government surveys and may be outdated.
Water
Clarity was measured with a Secchi disk in 2 years between 2004 and 2015; the latest annual mean is 8.5 m.