Gloucester Pool
44.8449° N, 79.7097° W
Depth contours from the 1968 government survey. Not for navigation.
Download the depth map (SVG)Gloucester Pool, Ontario. 44.8449° N, 79.7097° W
Maximum depth 27.4 m (1968 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/gloucester-pool/, 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.
- 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.
- Ontario Waterbody Location Identifier, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
Gloucester Pool is 27.4 m deep at its deepest point, deeper than 74% of the 2,688 surveyed lakes in Ontario. It covers 13 km² and lies 2 km north of Port Severn.
Government surveys have recorded 30 fish species here, including yellow perch, rock bass and pumpkinseed.
- Maximum depth
- 27.4 msurveyed 1968
- deeper than 74% of the 2,688 surveyed lakes in Ontario
- Area
- 13 km²
- larger than 96% of the 18,731 lakes in Ontario
- Shoreline
- 79.8 km
- longer than 97% of the 18,731 lakes in Ontario
- Water clarity
- 4.6 mSecchi depth, 2025
- clearer than 73% of the 1,251 monitored lakes in Ontario
- Fish species
- 30
- more than 99% of the 2,454 surveyed lakes in Ontario
- Elevation
- 179 m
Today on the water
6.3 °C
Observed at Midland, as of 2:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.4 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 | NW 20 | NW 20 | NW 20 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 |
| Gusts | 40 | 40 | 40 | 50 | 50 | |||
| Waves (est.) m | 0.2 | 0.2 | 0.2 | 0.4 | ||||
| Temp. °C | 5 | 5 | 7 | 11 | 14 | 13 | 9 | 6 |
| Precip. % | 40 | 40 | 40 | 40 | 20 | 20 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm early this evening. Wind northwest 30 km/h gusting to 50. Low plus 4.
Weather: Midland (local forecast), as of 2:03 a.m. EDT
Sun and moon
- Civil dawn
- 6:57 a.m.
- Sunrise
- 7:26 a.m.
- Sunset
- 6:44 p.m.
- Civil dusk
- 7:13 p.m.
- Moonrise
- 6:19 a.m.
- Moonset
- 6:03 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Barrie, as of 1:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
28% of Gloucester Pool is deeper than 10 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 1968 records a maximum depth of 27.4 m, drawn from 100 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 55 government surveys (2008–2014) that recorded them.
Forage fish and other species (17)
Forage fish
- Alewife 20
- Golden Shiner 4
- Spottail Shiner 4
- Tadpole Madtom 4
- Trout-Perch 4
- Blackchin Shiner 2
- Bluntnose Minnow 2
- Emerald Shiner 2
- Brook Silverside 1
- Deepwater Sculpin 1
- Logperch 1
- Rainbow Smelt 1
Other
- Brown Bullhead 13
- Longnose Gar 10
- Bowfin 3
- Round Goby 3
- Northern Sunfish 1
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 9 species from Gloucester Pool. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Black Crappie | 20-25 cm | 16 | 12 | Precautionary |
| Channel Catfish | 25-30 cm | 16 | 4 | Mercury |
| Largemouth Bass | 30-35 cm | 16 | 8 | Mercury |
| Northern Pike | 55-60 cm | 16 | 4 | Mercury |
| Rock Bass | 20-25 cm | 12 | 4 | Mercury |
| Smallmouth Bass | 35-40 cm | 12 | 4 | Mercury |
| Walleye | 40-45 cm | 8 | 4 | Mercury |
| Yellow Perch | 20-25 cm | 16 | 8 | Mercury |
| Brown Bullhead | 25-30 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 16. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 6 years between 1998 and 2025; the latest annual mean is 4.6 m.
Getting on the water
1 listed boat launch; 1 with parking listed. marks launches on the map.
- Emergency Access
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.