Armstrong Lake
46.5309° N, 81.5732° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Armstrong Lake, Ontario. 46.5309° N, 81.5732° W
Maximum depth 27.4 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/armstrong-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.
- 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).
Armstrong Lake is 27.4 m deep at its deepest point, deeper than 74% of the 2,688 surveyed lakes in Ontario. It covers 2.72 km² and lies 11 km southwest of Windy Lake.
- Maximum depth
- 27.4 m
- deeper than 74% of the 2,688 surveyed lakes in Ontario
- Area
- 2.72 km²
- larger than 85% of the 18,731 lakes in Ontario
- Shoreline
- 24.3 km
- longer than 90% of the 18,731 lakes in Ontario
- Water clarity
- 4.7 mSecchi depth, 2024
- clearer than 74% of the 1,251 monitored lakes in Ontario
- Elevation
- 353 m
Today on the water
3.6 °C
Observed at Sudbury (Greater), as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 8 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 4 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/h | W 10 | W 10 | NW 20 | NW 20 | NW 20 | NW 10 | var. 5 | SE 10 |
| Gusts km/h | 40 | 40 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.2 | 0.2 | ||||
| Temp. °C | 5 | 4 | 7 | 10 | 12 | 10 | 7 | 5 |
| Precip. % | 30 | 30 | 30 | 20 | 20 | 0 | 0 | 0 |
Tonight: Mainly cloudy with 30 percent chance of showers. Wind west 20 km/h gusting to 40 becoming light this evening. Low plus 4.
Weather: Sudbury (Greater) (local forecast), as of 3:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:05 a.m.
- Sunrise
- 7:35 a.m.
- Sunset
- 6:50 p.m.
- Civil dusk
- 7:20 p.m.
- Moonrise
- 6:27 a.m.
- Moonset
- 6:09 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Sudbury, as of 2:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
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 records a maximum depth of 27.4 m, drawn from 12 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 17 years between 2007 and 2024; the latest annual mean is 4.7 m.
Getting on the water
1 listed access point; 1 with parking listed.
- Armstrong
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.