Map of Sucker Lake with depth contours

Sucker Lake

45.2507° N, 79.6829° W

Depth contours from the 1968 government survey. Not for navigation.

Download the depth map (SVG)

Sucker Lake is 18.3 m deep at its deepest point, deeper than 54% of the 2,688 surveyed lakes in Ontario. It covers 1.11 km² and lies 2.3 km southwest of Rosseau.

Government surveys have recorded 1 fish species here: lake trout.

Maximum depth
18.3 msurveyed 1968
deeper than 54% of the 2,688 surveyed lakes in Ontario
Area
1.11 km²
larger than 70% of the 18,731 lakes in Ontario
Shoreline
6.8 km
longer than 62% of the 18,731 lakes in Ontario
Water clarity
4.5 mSecchi depth, 2023
clearer than 71% of the 1,251 monitored lakes in Ontario
Fish species
1
fewer than 100% of the 2,454 surveyed lakes in Ontario
Elevation
231 m

Today on the water

4.3 °C

ClearWind calm

Observed at Port Carling, as of 6:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Hourly forecast, next 24 hours
Time7 a.m.10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.4 a.m.
Wind km/hW 15W 15NW 30NW 30NW 15var. 5var. 5var. 5
Gusts km/h5050
Waves (est.) m0.10.10.20.2
Temp. °C58121411753
Precip. %4040402020000

Today: A mix of sun and cloud with 40 percent chance of showers this morning and early this afternoon. Clearing this afternoon. Wind becoming northwest 30 km/h gusting to 50 near noon. High 14. UV index 4 or moderate.

Weather: Port Carling (local forecast), as of 6:01 a.m. EDT

Sun and moon

Civil dawn
6:57 a.m.
Sunrise
7:27 a.m.
Sunset
6:44 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

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Depth

63% of Sucker 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 1968 records a maximum depth of 18.3 m, drawn from 10 depth contours.

Not for navigation. Depths are from government surveys and may be outdated.

Fish

  • Lake TroutStocked

Stocking

Lake Trout4,000 fish in 5 years, most recently 2025

All stocking records (5)
YearSpeciesFishStage
2025Lake Trout800Yearlings
2023Lake Trout800Yearlings
2021Lake Trout800Yearlings
2019Lake Trout800Yearlings
2017Lake Trout800Yearlings

Eating your catch

The provincial guide to eating fish (2026) sets limits for 1 species from Sucker Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Lake Trout45-50 cm8Do not eatMercury

* 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 15. Check seasons and limits before you fish.

Water

Clarity was measured with a Secchi disk in 11 years between 1991 and 2023; the latest annual mean is 4.5 m.

Water clarity (Secchi depth, m)
Total phosphorus (µg/L)