Marsh Lake
50.3983° N, 92.2559° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Marsh Lake, Ontario. 50.3983° N, 92.2559° W
Maximum depth 8 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/marsh-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.
- 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).
Marsh Lake is 8 m deep at its deepest point, shallower than 79% of the 2,688 surveyed lakes in Ontario. It covers 2.85 km² and lies 8 km north of Lac Seul.
- Maximum depth
- 8 m
- shallower than 79% of the 2,688 surveyed lakes in Ontario
- Area
- 2.85 km²
- larger than 86% of the 18,731 lakes in Ontario
- Shoreline
- 9.8 km
- longer than 73% of the 18,731 lakes in Ontario
- Elevation
- 361 m
Today on the water
3.1 °C
Observed at Sioux Lookout, as of 8:00 a.m. CDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 9 a.m., wind from the south: the south shore is sheltered, waves build toward the north 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 | S 15 | S 15 | SE 10 | SE 20 | SE 20 | SE 20 | SE 20 | SE 20 |
| Gusts km/h | 40 | 40 | 40 | 40 | 40 | |||
| Waves (est.) m | 0.2 | 0.2 | 0.1 | 0.2 | 0.2 | |||
| Temp. °C | 5 | 10 | 12 | 10 | 9 | 8 | 8 | 10 |
| Precip. % | 20 | 20 | 60 | 60 | 60 | 10 | 10 | 10 |
Today: A mix of sun and cloud. 30 percent chance of rain showers or flurries early this morning. 60 percent chance of rain this afternoon. High 12. UV index 2 or low.
Weather: Sioux Lookout (local forecast), as of 8:02 a.m. CDT
Sun and moon
- Civil dawn
- 6:49 a.m.
- Sunrise
- 7:22 a.m.
- Sunset
- 6:29 p.m.
- Civil dusk
- 7:02 p.m.
- Moonrise
- 6:14 a.m.
- Moonset
- 5:48 p.m.
- Moon
- Waning crescent, 1% lit
Depth
33% of Marsh Lake is shallower than 3 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 records a maximum depth of 8 m, drawn from 10 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.