Athelstane Lake
48.7746° N, 90.208° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Athelstane Lake, Ontario. 48.7746° N, 90.208° 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 Depths are from government surveys and may be outdated.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/athelstane-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.
- Aquatic Resource Area survey 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.
- 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).
- 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.
Athelstane Lake is 33.5 m deep at its deepest point, deeper than 83% of the 2,688 surveyed lakes in Ontario. It covers 17.8 km² and lies 18 km northwest of Shebandowan.
Government surveys have recorded 9 fish species here, including walleye, lake whitefish and yellow perch.
- Maximum depth
- 33.5 m
- deeper than 83% of the 2,688 surveyed lakes in Ontario
- Area
- 17.8 km²
- larger than 97% of the 18,731 lakes in Ontario
- Shoreline
- 42 km
- longer than 95% of the 18,731 lakes in Ontario
- Water clarity
- 2.4 mSecchi depth, 2019
- less clear than 77% of the 1,251 monitored lakes in Ontario
- Fish species
- 9
- more than 69% of the 2,454 surveyed lakes in Ontario
- Elevation
- 465 m
Today on the water
-1.8 °C
Observed at Upsala, as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 2 p.m., wind from the southeast: the southeast shore is sheltered, waves build toward the northwest 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 | var. 5 | var. 5 | var. 5 | S 20 | SE 20 | SE 20 | SE 20 | SE 20 |
| Gusts km/h | 40 | 40 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.2 | ||||
| Temp. °C | 0 | -1 | 4 | 12 | 14 | 12 | 11 | 10 |
| Precip. % | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Tonight: Partly cloudy with 40 percent chance of showers early this evening then clear. Wind northwest 20 km/h becoming light this evening. Low minus 2.
Weather: Upsala (local forecast), as of 3:00 a.m. EDT
Sun and moon
- Civil dawn
- 7:40 a.m.
- Sunrise
- 8:12 a.m.
- Sunset
- 7:22 p.m.
- Civil dusk
- 7:54 p.m.
- Moonrise
- 7:05 a.m.
- Moonset
- 6:41 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
26% of Athelstane Lake is shallower than 3 m, and 17% 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 74 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.
Fish
Sport fish by the share of the 53 government surveys (2008–2013) that recorded them.
Other species (1)
- White Sucker 16
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 8 species from Athelstane Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 60-65 cm | 12 | 4 | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 16 | Precautionary |
| Northern Pike | 55-60 cm | 12 | 4 | Mercury |
| Smallmouth Bass | 35-40 cm | 16 | 12 | Precautionary |
| Walleye | 40-45 cm | 16 | 8 | Mercury |
| Burbot (Ling) | 50-55 cm | 16 | 8 | Mercury |
| Cisco (Lake Herring) | 30-35 cm | 8 | 4 | Mercury |
| White Sucker | 40-45 cm | 16 | 16 | Precautionary |
* As defined in the guide, including children and people who are or may become pregnant. Limits are for the length the guide lists most often; they change with the size of the fish. Read the official guide
Fishing regulations: Fisheries Management Zone 6. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 2 years between 2012 and 2019; the latest annual mean is 2.4 m.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.