Dayohessarah Lake
48.7811° N, 85.03° W
Depth contours from the 1966 government survey. Not for navigation.
Download the depth map (SVG)Dayohessarah Lake, Ontario. 48.7811° N, 85.03° W
Maximum depth 36.6 m (1966 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/dayohessarah-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.
- 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.
Dayohessarah Lake is 36.6 m deep at its deepest point, deeper than 85% of the 2,688 surveyed lakes in Ontario. It covers 11.9 km² and lies 26 km northeast of White River.
Government surveys have recorded 12 fish species here, including lake trout, yellow perch and lake whitefish.
- Maximum depth
- 36.6 msurveyed 1966
- deeper than 85% of the 2,688 surveyed lakes in Ontario
- Area
- 11.9 km²
- larger than 96% of the 18,731 lakes in Ontario
- Shoreline
- 39.8 km
- longer than 94% of the 18,731 lakes in Ontario
- Fish species
- 12
- more than 81% of the 2,454 surveyed lakes in Ontario
- Elevation
- 391 m
Today on the water
0.6 °C
Observed at White River, as of 7:00 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 | 8 a.m. | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 a.m. | 5 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | var. 5 | W 20 | W 20 | SW 10 | SE 10 | SE 10 | SE 10 | SE 20 |
| Gusts km/h | 40 | 40 | 40 | |||||
| Waves (est.) m | 0.1 | 0.2 | 0.2 | 0.1 | 0.2 | |||
| Temp. °C | 2 | 5 | 9 | 10 | 7 | 4 | 1 | 3 |
| Precip. % | 0 | 0 | 0 | 0 | 0 | 0 | 30 | 30 |
Today: A mix of sun and cloud. 30 percent chance of showers early this morning. Wind becoming west 20 km/h gusting to 40 late this morning. High 10. UV index 3 or moderate.
Weather: White River (local forecast), as of 7:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:20 a.m.
- Sunrise
- 7:51 a.m.
- Sunset
- 7:02 p.m.
- Civil dusk
- 7:33 p.m.
- Moonrise
- 6:43 a.m.
- Moonset
- 6:20 p.m.
- Moon
- Waning crescent, 1% lit
Depth
20% of Dayohessarah 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 from 1966 records a maximum depth of 36.6 m, drawn from 47 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 29 government surveys (2012–2012) that recorded them.
Forage fish and other species (8)
Forage fish
- Lake Chub 11
- Logperch 10
- Spottail Shiner 10
- Blacknose Dace 5
- Blacknose Shiner 3
- Iowa Darter 1
Other
- Longnose Sucker 26
- White Sucker 21
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 5 species from Dayohessarah Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 12 | 4 | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 8 | Mercury |
| Burbot (Ling) | 35-40 cm | 16 | 8 | Mercury |
| Longnose Sucker | 40-45 cm | 16 | 12 | 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 7. Check seasons and limits before you fish.