Guilfoyle Lake
49.7554° N, 82.3613° W
Depth contours from the 1986 government survey. Not for navigation.
Download the depth map (SVG)Guilfoyle Lake, Ontario. 49.7554° N, 82.3613° W
Maximum depth 8 m (1986 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/guilfoyle-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.
- 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Guilfoyle Lake is 8 m deep at its deepest point, shallower than 79% of the 2,688 surveyed lakes in Ontario. It covers 7.69 km² and lies 28 km south of Little Long Rapids.
Government surveys have recorded 10 fish species here, including walleye, yellow perch and northern pike.
- Maximum depth
- 8 msurveyed 1986
- shallower than 79% of the 2,688 surveyed lakes in Ontario
- Area
- 7.69 km²
- larger than 94% of the 18,731 lakes in Ontario
- Shoreline
- 16.2 km
- longer than 84% of the 18,731 lakes in Ontario
- Fish species
- 10
- more than 73% of the 2,454 surveyed lakes in Ontario
- Elevation
- 211 m
Today on the water
2.8 °C
Observed at Kapuskasing, as of 4:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 8 a.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 10 | NW 20 | W 20 | W 20 | W 10 | var. 5 | var. 5 | SE 10 |
| Gusts km/h | 40 | |||||||
| Waves (est.) m | 0.1 | 0.2 | 0.2 | 0.2 | 0.1 | |||
| Temp. °C | 1 | 1 | 4 | 7 | 9 | 6 | 3 | 1 |
| Precip. % | 20 | 20 | 20 | 0 | 0 | 0 | 0 | 0 |
Tonight: Cloudy. 60 percent chance of showers this evening. Wind northwest 20 km/h gusting to 40 becoming light early this evening. Low plus 1.
Weather: Kapuskasing (local forecast), as of 4:01 a.m. EDT
Sun and moon
- Civil dawn
- 7:09 a.m.
- Sunrise
- 7:41 a.m.
- Sunset
- 6:50 p.m.
- Civil dusk
- 7:22 p.m.
- Moonrise
- 6:32 a.m.
- Moonset
- 6:09 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
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 1986 records a maximum depth of 8 m, drawn from 25 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 20 government surveys (2010–2010) that recorded them.
Forage fish and other species (5)
Forage fish
- Spottail Shiner 8
- Logperch 7
- Johnny Darter 1
- Trout-Perch 1
Other
- White Sucker 13
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 2 species from Guilfoyle Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Northern Pike | 55-60 cm | 12 | 4 | Mercury |
| Walleye | 40-45 cm | 16 | 8 | 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 8. Check seasons and limits before you fish.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.