Big Lake
45.7367° N, 82.0883° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Big Lake, Ontario. 45.7367° N, 82.0883° W
Maximum depth 8 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/big-lake-near-northeastern-manitoulin-and-the-islands/, 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.
- Lake Partner Program, Ontario Ministry of the Environment, Conservation and Parks. 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).
Big Lake is 8 m deep at its deepest point, shallower than 79% of the 2,688 surveyed lakes in Ontario. It covers 3.79 km² and lies 5.2 km east of Mindemoya.
- Maximum depth
- 8 m
- shallower than 79% of the 2,688 surveyed lakes in Ontario
- Area
- 3.79 km²
- larger than 89% of the 18,731 lakes in Ontario
- Shoreline
- 9.2 km
- longer than 71% of the 18,731 lakes in Ontario
- Water clarity
- 2.9 mSecchi depth, 2024
- less clear than 67% of the 1,251 monitored lakes in Ontario
- Elevation
- 227 m
Today on the water
9 °C
Observed at Gore Bay, 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.
| Time | 4 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/h | W 30 | W 15 | NW 20 | NW 20 | NW 30 | W 10 | var. 5 | SE 15 |
| Gusts km/h | 40 | 40 | ||||||
| Waves (est.) m | 0.3 | 0.1 | 0.2 | 0.2 | ||||
| Temp. °C | 7 | 7 | 10 | 13 | 15 | 13 | 11 | 6 |
| Precip. % | 30 | 30 | 30 | 20 | 20 | 0 | 0 | 0 |
Tonight: Mainly cloudy with 30 percent chance of showers. Wind northwest 40 km/h gusting to 60 becoming light late this evening. Wind becoming west 30 after midnight. Low 7.
Weather: Gore Bay (local forecast), as of 3:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:07 a.m.
- Sunrise
- 7:37 a.m.
- Sunset
- 6:53 p.m.
- Civil dusk
- 7:23 p.m.
- Moonrise
- 6:29 a.m.
- Moonset
- 6:11 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
The government depth survey records a maximum depth of 8 m, drawn from 239 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.
Water
Clarity was measured with a Secchi disk in 13 years between 2011 and 2024; the latest annual mean is 2.9 m.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.