Lake St. Clair
42.3996° N, 82.6214° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Lake St. Clair, Ontario. 42.3996° N, 82.6214° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/lake-st-clair/, 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.
- Fisheries Management Zones, 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).
- 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.
- Photographs, Wikimedia Commons contributors. Each photo carries its own licence (CC0, public domain, CC BY or CC BY-SA), credited where shown.
Lake St. Clair covers 1,160 km², making it larger than 99% of the 18,731 lakes in Ontario. It lies 1.9 km northeast of Riverside.
Government surveys have recorded 23 fish species here, including rock bass, largemouth bass and pumpkinseed.
- Area
- 1,160 km²
- larger than 99% of the 18,731 lakes in Ontario
- Shoreline
- 445 km
- longer than 99% of the 18,731 lakes in Ontario
- Fish species
- 23
- more than 98% of the 2,454 surveyed lakes in Ontario
- Elevation
- 173 m
Today on the water
8.1 °C
Observed at Windsor, as of 2:00 a.m. EDT
rough Estimated waves, next 12 hours: up to 0.7 m.
| 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 | W 15 | W 15 | W 15 | W 20 | W 20 | SE 10 | SE 15 | SE 15 |
| Waves (est.) m | 0.5 | 0.5 | 0.5 | 0.7 | ||||
| Temp. °C | 8 | 8 | 11 | 16 | 20 | 20 | 16 | 15 |
| Precip. % | 10 | 10 | 10 | 10 | 10 | 0 | 0 | 0 |
Tonight: Clear. Wind west 30 km/h gusting to 50 becoming light this evening. Low 7.
Weather: Windsor (local forecast), as of 2:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:08 a.m.
- Sunrise
- 7:36 a.m.
- Sunset
- 6:58 p.m.
- Civil dusk
- 7:26 p.m.
- Moonrise
- 6:30 a.m.
- Moonset
- 6:16 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
3 low risk
Windsor Downtown, as of 1:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Fish
Sport fish by the share of the 11 government surveys (2007–2011) that recorded them.
Forage fish and other species (15)
Forage fish
- Bluntnose Minnow 2
- Alewife 1
- Banded Killifish 1
- Brook Silverside 1
- Common Shiner 1
- Emerald Shiner 1
- Gizzard Shad 1
- Spottail Shiner 1
Other
- Brown Bullhead 8
- Common Carp 1
- Green Sunfish 1
- Longnose Sucker 1
- White Perch 1
- White Sucker 1
- Yellow Bullhead 1
Numbers are the surveys that recorded each species.
Stocking
Rainbow Trout35,000 fish in 1 year, most recently 2018
Brown Trout25,000 fish in 1 year, most recently 2018
All stocking records (2)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2018 | Brown Trout | 25,000 | Fingerlings |
| 2018 | Rainbow Trout | 35,000 | Fingerlings |
Eating your catch
The provincial guide to eating fish (2026) sets limits for 16 species from Lake St. Clair. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Black Crappie | 20-25 cm | 4 | 4 | PFAS |
| Bluegill | 15-20 cm | 4 | 4 | PFAS |
| Channel Catfish | 45-50 cm | 4 | 4 | PCB |
| Freshwater Drum | 45-50 cm | 4 | 4 | PFAS |
| Largemouth Bass | 30-35 cm | 4 | 4 | PFAS |
| Northern Pike | 55-60 cm | 8 | 4 | PFAS |
| Pumpkinseed | 15-20 cm | 4 | 4 | PFAS |
| Rock Bass | 15-20 cm | 4 | 4 | PFAS |
| Smallmouth Bass | 35-40 cm | 2 | Do not eat | PFAS |
| Walleye | 40-45 cm | 4 | 4 | PFAS |
| White Bass | 30-35 cm | 2 | Do not eat | PFAS |
| Yellow Perch | 20-25 cm | 8 | 8 | PFAS |
| Brown Bullhead | 25-30 cm | 16 | 8 | Mercury |
| Common Carp | 55-60 cm | 4 | 4 | PFAS |
| White Perch | 15-20 cm | 8 | 8 | PCB |
| White Sucker | 40-45 cm | 8 | 8 | PFAS |
* 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 19. Check seasons and limits before you fish.
Photos
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![U.S. Coast Guard photo by [null Courtesy]](https://commons.wikimedia.org/wiki/File:Coast_Guard_rescues_2_from_ice_floe_on_Lake_St_Clair_(9536990).jpg){kind=link}
Follow this lake
Every Friday by email: the Environment Canada forecast, the water level at the nearest gauge and any weather alerts in effect.