Map of Lac Otis

Lac Otis

48.3068° N, 70.6499° W

Shoreline and neighbouring water from open government data.

Download the map (SVG)

Lac Otis covers 5.72 km², making it larger than 92% of the 29,407 lakes in Quebec. It lies 1.6 km northeast of Lac-Goth.

Area
5.72 km²
larger than 92% of the 29,407 lakes in Quebec
Shoreline
21.7 km
longer than 89% of the 29,407 lakes in Quebec
Water clarity
2.9 mSecchi depth, 2025
less clear than 67% of the 805 monitored lakes in Quebec
Elevation
210 m

Today on the water

7.4 °C

Light RainshowerWind WNW 24 km/h

Observed at Bagotville, as of 3:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.3 m. Around 4 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
Time4 a.m.7 a.m.10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.
Wind km/hW 30W 20W 20W 20W 20W 20W 20W 20
Gusts km/h40404040404040
Waves (est.) m0.30.20.20.20.2
Temp. °C54576443
Precip. %4040404040404040

Tonight: A few showers ending this evening then mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm early this evening. Wind west 30 km/h. Low plus 4.

Weather: Bagotville (local forecast), as of 3:03 a.m. EDT

Sun and moon

Civil dawn
6:22 a.m.
Sunrise
6:53 a.m.
Sunset
6:05 p.m.
Civil dusk
6:36 p.m.
Moonrise
5:42 a.m.
Moonset
5:23 p.m.
Moon
Waning crescent, 1% lit

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

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 Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: meso-eutrophic (transition).

Clarity was measured with a Secchi disk in 17 years between 2006 and 2025; the latest annual mean is 2.9 m.

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

Photos

Lac Otis, Saint-Félix-d'Otis, Québec, Canada
Photo: Maxime Laterreur, CC BY-SA 4.0, via Wikimedia Commons