Matagamasi Lake
46.797° N, 80.5889° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Matagamasi Lake, Ontario. 46.797° N, 80.5889° W
Maximum depth 51.8 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/matagamasi-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.
- Aquatic Resource Area survey points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Matagamasi Lake is 51.8 m deep at its deepest point, deeper than 94% of the 2,688 surveyed lakes in Ontario. It covers 13.2 km² and lies 14 km north of Carr's Landing.
Government surveys have recorded 4 fish species here, including burbot, smallmouth bass and lake trout.
- Maximum depth
- 51.8 m
- deeper than 94% of the 2,688 surveyed lakes in Ontario
- Area
- 13.2 km²
- larger than 96% of the 18,731 lakes in Ontario
- Shoreline
- 97.3 km
- longer than 98% of the 18,731 lakes in Ontario
- Water clarity
- 7 mSecchi depth, 2024
- clearer than 96% of the 1,251 monitored lakes in Ontario
- Fish species
- 4
- fewer than 51% of the 2,454 surveyed lakes in Ontario
- Elevation
- 265 m
Today on the water
4 °C
Observed at Greater Sudbury, as of 2:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Wind from the west: the west shore is sheltered, waves build toward the east shore.
| Time | 3 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/h | W 10 | W 10 | NW 20 | NW 20 | NW 20 | NW 10 | var. 5 | SE 10 |
| Gusts | 40 | 40 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.2 | 0.2 | ||||
| Temp. °C | 4 | 5 | 5 | 9 | 12 | 11 | 7 | 6 |
| 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: Greater Sudbury (local forecast), as of 2:03 a.m. EDT
Sun and moon
- Civil dawn
- 7:01 a.m.
- Sunrise
- 7:32 a.m.
- Sunset
- 6:46 p.m.
- Civil dusk
- 7:16 p.m.
- Moonrise
- 6:23 a.m.
- Moonset
- 6:04 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Sudbury, as of 1:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
3% of Matagamasi Lake is deeper than 30 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 51.8 m, drawn from 117 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.
Fish
Sport fish by the share of the 5 government surveys (2018–2018) that recorded them.
Other species (1)
- White Sucker 5
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 7 species from Matagamasi Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 16 | 16 | Precautionary |
| Northern Pike | 55-60 cm | 16 | 8 | Mercury, Selenium |
| Smallmouth Bass | 35-40 cm | 16 | 8 | Mercury, Selenium |
| Walleye | 40-45 cm | 16 | 8 | Mercury |
| Brown Bullhead | 20-25 cm | 16 | 16 | Precautionary |
| Burbot (Ling) | 50-55 cm | 16 | 4 | Mercury |
| White Sucker | 40-45 cm | 8 | 8 | Selenium |
* As defined in the guide, including children and people who are or may become pregnant. Limits are for the length the guide lists most often; they change with the size of the fish. Read the official guide
Fishing regulations: Fisheries Management Zone 10. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 11 years between 2006 and 2024; the latest annual mean is 7 m.
Getting on the water
1 listed boat launch. marks launches on the map.
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.