Sun Lake
49.4189° N, 86.5828° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Sun Lake, Ontario. 49.4189° N, 86.5828° W
Maximum depth 33.5 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/sun-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).
Sun Lake is 33.5 m deep at its deepest point, deeper than 83% of the 2,688 surveyed lakes in Ontario. It covers 1.73 km² and lies 30 km south of Theresa.
- Maximum depth
- 33.5 m
- deeper than 83% of the 2,688 surveyed lakes in Ontario
- Area
- 1.73 km²
- larger than 78% of the 18,731 lakes in Ontario
- Shoreline
- 12 km
- longer than 78% of the 18,731 lakes in Ontario
- Elevation
- 342 m
Today on the water
3.6 °C
Observed at Greenstone (Geraldton), as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 11 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 | NW 10 | W 10 | W 10 | W 20 | W 10 | S 10 | S 10 | SE 10 |
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.2 | ||||
| Temp. °C | 1 | 0 | 3 | 8 | 10 | 10 | 8 | 6 |
| Precip. % | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 20 |
Tonight: Cloudy with 60 percent chance of showers. Wind northwest 20 km/h gusting to 40 becoming light this evening. Low zero.
Weather: Greenstone (Geraldton) (local forecast), as of 3:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:26 a.m.
- Sunrise
- 7:58 a.m.
- Sunset
- 7:07 p.m.
- Civil dusk
- 7:39 p.m.
- Moonrise
- 6:50 a.m.
- Moonset
- 6:26 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
28% of Sun Lake is deeper than 20 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 33.5 m, drawn from 30 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.