Isabella Lake
45.4032° N, 79.8134° W
Depth contours from the 1983 government survey. Not for navigation.
Download the depth map (SVG)Isabella Lake, Ontario. 45.4032° N, 79.8134° W
Maximum depth 12.2 m (1983 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/isabella-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.
- Fish stocking for recreational purposes, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- 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.
- 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).
- Air Quality Health Index observations and forecasts, 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.
Isabella Lake is 12.2 m deep at its deepest point, shallower than 65% of the 2,688 surveyed lakes in Ontario. It covers 1.87 km² and lies 2.3 km northwest of Orrville.
Government surveys have recorded 7 fish species here, including bluegill, yellow perch and walleye.
- Maximum depth
- 12.2 msurveyed 1983
- shallower than 65% of the 2,688 surveyed lakes in Ontario
- Area
- 1.87 km²
- larger than 79% of the 18,731 lakes in Ontario
- Shoreline
- 12.7 km
- longer than 80% of the 18,731 lakes in Ontario
- Water clarity
- 2.5 mSecchi depth, 2023
- less clear than 75% of the 1,251 monitored lakes in Ontario
- Fish species
- 7
- more than 61% of the 2,454 surveyed lakes in Ontario
- Elevation
- 223 m
Today on the water
9.2 °C
Observed at Parry Sound, as of 4:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 5 a.m. | 8 a.m. | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.3 | 0.3 | |||
| Temp. °C | 5 | 7 | 10 | 13 | 14 | 9 | 5 | 3 |
| Precip. % | 40 | 40 | 40 | 20 | 20 | 0 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 5.
Weather: Parry Sound (local forecast), as of 4:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:58 a.m.
- Sunrise
- 7:27 a.m.
- Sunset
- 6:44 p.m.
- Civil dusk
- 7:14 p.m.
- Moonrise
- 6:19 a.m.
- Moonset
- 6:03 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Parry Sound, as of 4:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
34% of Isabella Lake is shallower than 3 m, and 44% is deeper than 5 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 1983 records a maximum depth of 12.2 m, drawn from 21 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 1 government surveys (2007–2007) that recorded them.
Forage fish and other species (4)
- Bluntnose Minnow 1
- Common Shiner 1
- Creek Chub 1
- Spottail Shiner 1
Numbers are the surveys that recorded each species.
Stocking
Walleye19,716 fish in 1 year, most recently 2017
All stocking records (1)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2017 | Walleye | 19,716 | Fry |
Eating your catch
The provincial guide to eating fish (2026) sets limits for 3 species from Isabella Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Northern Pike | 55-60 cm | 4 | Do not eat | Mercury |
| Smallmouth Bass | 35-40 cm | 4 | Do not eat | Mercury |
| Walleye | 40-45 cm | 4 | Do not eat | Mercury |
* 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 15. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 20 years between 1992 and 2023; the latest annual mean is 2.5 m.
Getting on the water
1 listed boat launch; 1 with parking listed. marks launches on the map.
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.