Constance Lake
45.4089° N, 75.9786° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Constance Lake, Ontario. 45.4089° N, 75.9786° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/constance-lake-near-gatineau/, 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.
- 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.
Constance Lake covers 1.46 km², making it larger than 75% of the 18,731 lakes in Ontario. It lies 2.2 km northwest of Harwood Plains.
Government surveys have recorded 11 fish species here, including pumpkinseed, black crappie and bluegill.
- Area
- 1.46 km²
- larger than 75% of the 18,731 lakes in Ontario
- Shoreline
- 7.2 km
- longer than 63% of the 18,731 lakes in Ontario
- Fish species
- 11
- more than 77% of the 2,454 surveyed lakes in Ontario
- Elevation
- 55 m
Today on the water
5.7 °C
Observed at Chelsea, as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 9 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast 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 | W 10 | NW 10 | NW 20 | NW 20 | NW 20 | NW 10 | var. 5 | var. 5 |
| Waves (est.) m | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | |||
| Temp. °C | 5 | 5 | 8 | 11 | 11 | 7 | 4 | 2 |
| Precip. % | 60 | 30 | 30 | 30 | 30 | 0 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Wind west 20 km/h becoming light early this evening. Low plus 5.
Weather: Chelsea (local forecast), as of 3:01 a.m. EDT
Sun and moon
- Civil dawn
- 6:42 a.m.
- Sunrise
- 7:12 a.m.
- Sunset
- 6:29 p.m.
- Civil dusk
- 6:58 p.m.
- Moonrise
- 6:03 a.m.
- Moonset
- 5:47 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Ottawa, as of 3:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Fish
Sport fish by the share of the 3 government surveys (2014–2018) that recorded them.
Forage fish and other species (4)
Forage fish
- Banded Killifish 2
- Central Mudminnow 1
- Creek Chub 1
Other
- Yellow Bullhead 2
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 1 species from Constance Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Northern Pike | 55-60 cm | 8 | 4 | 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 18. Check seasons and limits before you fish.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.