Map of Bolger Lake

Bolger Lake

45.6686° N, 80.1519° W

Shoreline and neighbouring water from open government data.

Download the map (SVG)

Bolger Lake covers 3.18 km², making it larger than 87% of the 18,731 lakes in Ontario. It lies 1.3 km southwest of Bolger.

Area
3.18 km²
larger than 87% of the 18,731 lakes in Ontario
Shoreline
26.4 km
longer than 91% of the 18,731 lakes in Ontario
Water clarity
4 mSecchi depth, 2025
clearer than 63% of the 1,251 monitored lakes in Ontario
Elevation
228 m

Today on the water

7.3 °C

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

choppy Estimated waves, next 12 hours: up to 0.3 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.) m0.10.10.30.30.1
Temp. °C58121410531
Precip. %6030202020000

Today: A mix of sun and cloud. 60 percent chance of showers this morning. 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: Dunchurch (local forecast), as of 6:01 a.m. EDT

Sun and moon

Civil dawn
6:59 a.m.
Sunrise
7:29 a.m.
Sunset
6:45 p.m.
Civil dusk
7:15 p.m.
Moonrise
6:21 a.m.
Moonset
6:04 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

1 low risk

Parry Sound, as of 5:00 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 18 years between 1998 and 2025; the latest annual mean is 4 m.

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