Lac Seul
50.4028° N, 92.4787° W
Depth contours from the 1969 government survey. Not for navigation.
Download the depth map (SVG)Lac Seul, Ontario. 50.4028° N, 92.4787° W
Maximum depth 36.6 m (1969 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/lac-seul/, 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.
- Fishing access points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- 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.
- Real-time hydrometric data, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- National Water Data Archive (HYDAT) daily means, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- 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.
- Ontario Waterbody Location Identifier, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Photographs, Wikimedia Commons contributors. Each photo carries its own licence (CC0, public domain, CC BY or CC BY-SA), credited where shown.
Lac Seul is 36.6 m deep at its deepest point, deeper than 85% of the 2,688 surveyed lakes in Ontario. It covers 1,150 km² and lies beside Kejick Bay.
- Maximum depth
- 36.6 msurveyed 1969
- deeper than 85% of the 2,688 surveyed lakes in Ontario
- Area
- 1,150 km²
- larger than 99% of the 18,731 lakes in Ontario
- Shoreline
- 3,030 km
- longer than 99% of the 18,731 lakes in Ontario
- Elevation
- 355 m
Today on the water
0.1 °C
Observed at Ear Falls, as of 2:00 a.m. CDT
choppy Estimated waves, next 12 hours: up to 0.4 m. Around 10 a.m., wind from the south: the south shore is sheltered, waves build toward the north shore.
| Time | 3 a.m. | 6 a.m. | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | S 10 | S 10 | S 10 | S 20 | E 10 | SE 30 | SE 30 | SE 30 |
| Gusts km/h | 50 | 50 | 50 | |||||
| Waves (est.) m | 0.2 | 0.2 | 0.2 | 0.4 | ||||
| Temp. °C | 2 | 1 | 5 | 9 | 11 | 10 | 9 | 8 |
| Precip. % | 20 | 20 | 20 | 20 | 60 | 60 | 60 | 10 |
Tonight: A few clouds. Wind northwest 20 km/h gusting to 40 becoming light this evening. Low plus 1.
Weather: Ear Falls (local forecast), as of 2:02 a.m. CDT
Water level
Lac Seul at Goldpines: 356.37 m at 12:30 a.m. CDT: 12 cm above the median for this time of year, within the normal range.
Normal range (25th–75th percentile, HYDAT) Last 7 days
Provisional real-time data, subject to revision. hydrometric station 05QB003
Sun and moon
- Civil dawn
- 6:50 a.m.
- Sunrise
- 7:22 a.m.
- Sunset
- 6:30 p.m.
- Civil dusk
- 7:02 p.m.
- Moonrise
- 6:15 a.m.
- Moonset
- 5:49 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
19% of Lac Seul is shallower than 3 m, and 13% 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 from 1969 records a maximum depth of 36.6 m, drawn from 1,354 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.
Getting on the water
6 listed boat launches; 3 with parking listed. marks launches on the map.
East shore
- Sen Bay Boat Launch
Southeast shore
- Deception Bay Boat Launch N of HWY
Southwest shore
- Williams Bay Access Point
- Williams Lake
West shore
- Boat launch
Northwest shore
- Corporation Of The Township Of Ear Falls
Follow this lake
Every Friday by email: the Environment Canada forecast, the water level at the nearest gauge and any weather alerts in effect.