Map of Little Manitouwaba Lake with depth contours

Little Manitouwaba Lake

45.4088° N, 79.7272° W

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

Download the depth map (SVG)

Little Manitouwaba Lake is 18.3 m deep at its deepest point, deeper than 54% of the 2,688 surveyed lakes in Ontario. It covers 0.78 km² and lies 4.6 km northeast of Orrville.

Maximum depth
18.3 msurveyed 1968
deeper than 54% of the 2,688 surveyed lakes in Ontario
Area
0.78 km²
larger than 62% of the 18,731 lakes in Ontario
Shoreline
5.3 km
longer than 52% of the 18,731 lakes in Ontario
Elevation
282 m

Today on the water

13.2 °C

Observed at Parry Sound, as of 10:00 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
Time11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.5 a.m.8 a.m.
Wind km/hW 15NW 30NW 30NW 15var. 5var. 5SE 10SE 15
Gusts km/h5050
Waves (est.) m0.10.20.20.1
Temp. °C10131495324
Precip. %30202000000

Today: A mix of sun and cloud with 60 percent chance of showers this morning. Clearing this afternoon. Risk of a thunderstorm early this morning. Wind becoming northwest 30 km/h gusting to 50 near noon. High 14. UV index 4 or moderate.

Weather: Parry Sound (local forecast), as of 10:00 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 9:00 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

30% of Little Manitouwaba Lake is shallower than 3 m, and 21% 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 7 depth contours.

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 Depths are from government surveys and may be outdated.