Whiterock Lake
49.867° N, 91.2493° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Whiterock Lake, Ontario. 49.867° N, 91.2493° W
Maximum depth 9.1 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/whiterock-lake/, compiled October 9, 2026
- Canadian Geographical Names Database, Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada.
- HydroLAKES v1.0, Messager et al. 2016 / WWF HydroSHEDS. Licensed under CC BY 4.0.
- Census boundaries and population, 2021, Statistics Canada. Adapted from Statistics Canada. This does not constitute an endorsement by Statistics Canada.
- Fisheries Management Zones, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Bathymetry lines and survey index, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- City page weather forecasts and alerts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Whiterock Lake is 9.1 m deep at its deepest point, shallower than 76% of the 2,688 surveyed lakes in Ontario. It covers 7.91 km² and lies 4.7 km northwest of O'Briens Landing.
- Maximum depth
- 9.1 m
- shallower than 76% of the 2,688 surveyed lakes in Ontario
- Area
- 7.91 km²
- larger than 94% of the 18,731 lakes in Ontario
- Shoreline
- 18.1 km
- longer than 86% of the 18,731 lakes in Ontario
- Elevation
- 402 m
Today on the water
0.4 °C
Observed at Sioux Lookout, as of 4:00 a.m. CDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 7 a.m., wind from the south: the south shore is sheltered, waves build toward the north shore.
| Time | 5 a.m. | 8 a.m. | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | S 10 | S 20 | S 20 | SE 20 | SE 20 | SE 30 | SE 30 | SE 20 |
| Gusts km/h | 40 | 50 | 50 | 40 | ||||
| Waves (est.) m | 0.1 | 0.3 | 0.3 | 0.2 | 0.2 | |||
| Temp. °C | 0 | 3 | 8 | 11 | 11 | 10 | 7 | 6 |
| Precip. % | 20 | 20 | 20 | 60 | 60 | 60 | 10 | 10 |
Tonight: Partly cloudy. Becoming clear this evening. Wind northwest 30 km/h gusting to 50 becoming light this evening. Low minus 1.
Weather: Sioux Lookout (local forecast), as of 4:02 a.m. CDT
Sun and moon
- Civil dawn
- 6:45 a.m.
- Sunrise
- 7:17 a.m.
- Sunset
- 6:26 p.m.
- Civil dusk
- 6:58 p.m.
- Moonrise
- 6:10 a.m.
- Moonset
- 5:44 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
44% of Whiterock Lake is shallower than 3 m, and 36% is deeper than 5 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 records a maximum depth of 9.1 m, drawn from 11 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
Not for navigation. Depths are from government surveys and may be outdated.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.