Lower Matagamasi Lake
46.8397° N, 80.4842° W
Depth contours from the 1979 government survey. Not for navigation.
Download the depth map (SVG)Lower Matagamasi Lake, Ontario. 46.8397° N, 80.4842° W
Maximum depth 18 m (1979 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/lower-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.
- 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Lower Matagamasi Lake is 18 m deep at its deepest point, deeper than 52% of the 2,688 surveyed lakes in Ontario. It covers 1.31 km² and lies 26 km west of Camp White Bear.
Government surveys have recorded 9 fish species here, including smallmouth bass, yellow perch and rock bass.
- Maximum depth
- 18 msurveyed 1979
- deeper than 52% of the 2,688 surveyed lakes in Ontario
- Area
- 1.31 km²
- larger than 73% of the 18,731 lakes in Ontario
- Shoreline
- 7.8 km
- longer than 66% of the 18,731 lakes in Ontario
- Fish species
- 9
- more than 69% of the 2,454 surveyed lakes in Ontario
- Elevation
- 253 m
Today on the water
4 °C
Observed at West Nipissing, as of 4:00 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 | 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 10 | NW 20 | NW 20 | NW 20 | NW 10 | var. 5 | SE 10 | SE 10 |
| Gusts km/h | 40 | |||||||
| Waves (est.) m | 0.1 | 0.2 | 0.2 | 0.2 | ||||
| Temp. °C | 4 | 4 | 8 | 13 | 14 | 9 | 5 | 3 |
| Precip. % | 30 | 30 | 20 | 20 | 20 | 0 | 0 | 0 |
Tonight: Mainly cloudy with 30 percent chance of showers. Wind southwest 20 km/h becoming light early this evening. Low plus 4.
Weather: West Nipissing (local forecast), as of 4:00 a.m. EDT
Sun and moon
- Civil dawn
- 7:01 a.m.
- Sunrise
- 7:31 a.m.
- Sunset
- 6:45 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 3:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
29% of Lower Matagamasi Lake is deeper than 10 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 1979 records a maximum depth of 18 m, drawn from 17 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 15 government surveys (2011–2011) that recorded them.
Forage fish and other species (3)
Forage fish
- Bluntnose Minnow 5
Other
- White Sucker 10
- Brown Bullhead 4
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 3 species from Lower Matagamasi Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 25-30 cm | 16 | 16 | Precautionary |
| Smallmouth Bass | 35-40 cm | 16 | 4 | Mercury |
| Walleye | 40-45 cm | 16 | 8 | Mercury |
* 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.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.