Lake of Many Islands
45.7642° N, 79.69° W
Depth contours from the 1968 government survey. Not for navigation.
Download the depth map (SVG)Lake of Many Islands, Ontario. 45.7642° N, 79.69° W
Maximum depth 27.4 m (1968 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/lake-of-many-islands/, 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.
- 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).
Lake of Many Islands is 27.4 m deep at its deepest point, deeper than 74% of the 2,688 surveyed lakes in Ontario. It covers 2.33 km² and lies 11 km northwest of Magnetawan.
- Maximum depth
- 27.4 msurveyed 1968
- deeper than 74% of the 2,688 surveyed lakes in Ontario
- Area
- 2.33 km²
- larger than 83% of the 18,731 lakes in Ontario
- Shoreline
- 17.3 km
- longer than 85% of the 18,731 lakes in Ontario
- Elevation
- 305 m
Today on the water
9.2 °C
Observed at Dunchurch, as of 4:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 5 a.m. | 8 a.m. | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.3 | 0.3 | |||
| Temp. °C | 4 | 6 | 9 | 13 | 14 | 8 | 4 | 2 |
| Precip. % | 40 | 40 | 40 | 20 | 20 | 0 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 4.
Weather: Dunchurch (local forecast), as of 4:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:57 a.m.
- Sunrise
- 7:27 a.m.
- Sunset
- 6:43 p.m.
- Civil dusk
- 7:13 p.m.
- Moonrise
- 6:19 a.m.
- Moonset
- 6:02 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Parry Sound, as of 4:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
The government depth survey from 1968 records a maximum depth of 27.4 m, drawn from 16 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.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.