Map of Ril Lake

Ril Lake

45.1649° N, 79.0125° W

Shoreline and neighbouring water from open government data.

Download the map (SVG)

Ril Lake covers 1.45 km², making it larger than 75% of the 18,731 lakes in Ontario. It lies 3.4 km southeast of Grandview.

Area
1.45 km²
larger than 75% of the 18,731 lakes in Ontario
Shoreline
11.7 km
longer than 77% of the 18,731 lakes in Ontario
Water clarity
2.3 mSecchi depth, 2025
less clear than 78% of the 1,251 monitored lakes in Ontario
Elevation
342 m

Today on the water

7 °C

Mainly ClearWind NNW 9 km/h

Observed at Huntsville, as of 5:00 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
Time6 a.m.9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.3 a.m.
Wind km/hW 15W 15NW 30NW 30NW 15var. 5var. 5var. 5
Gusts km/h5050
Waves (est.) m0.10.10.20.20.1
Temp. °C3591212731
Precip. %4040402020000

Today: A mix of sun and cloud. 40 percent chance of showers this morning and early this afternoon. Wind becoming northwest 30 km/h gusting to 50 near noon. High 13. UV index 4 or moderate.

Weather: Huntsville (local forecast), as of 5:01 a.m. EDT

Sun and moon

Civil dawn
6:54 a.m.
Sunrise
7:24 a.m.
Sunset
6:41 p.m.
Civil dusk
7:10 p.m.
Moonrise
6:16 a.m.
Moonset
5:59 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

2 low risk

Dorset, 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.

Water

Clarity was measured with a Secchi disk in 16 years between 1992 and 2025; the latest annual mean is 2.3 m.

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

Getting on the water

1 listed boat launch. marks launches on the map.