Fanshawe Lake (Ontario): Depth Map, Fishing & Water Quality

Map of Fanshawe Lake with depth contours — Fanshawe Lake
43.0585° N, 81.1789° W

Depth contours from the 1968 government survey. Not for navigation.

Fanshawe Lake, Ontario. 43.0585° N, 81.1789° W

Maximum depth 10.7 m (1968 survey). Scale bar on the map.

Not for navigation. Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/fanshawe-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).
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.

Fanshawe Lake is 10.7 m deep at its deepest point, shallower than 69% of the 2,688 surveyed lakes in Ontario. It covers 2.52 km² and lies 3.1 km north of Huron Heights.

Government surveys have recorded 20 fish species here, including yellow perch, walleye and pumpkinseed.

Maximum depth: 10.7 msurveyed 1968; shallower than 69% of the 2,688 surveyed lakes in Ontario
Area: 2.52 km²; larger than 84% of the 18,731 lakes in Ontario
Shoreline: 16.8 km; longer than 85% of the 18,731 lakes in Ontario
Fish species: 20; more than 96% of the 2,454 surveyed lakes in Ontario
Elevation: 262 m

Today on the water

7.7 °C

ClearWind WNW 4 km/h

Observed at London, as of 3:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 4 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
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 15	W 15	W 15	NW 20	NW 20	NW 10	var. 5	SE 10
Gusts km/h				40	40
Waves (est.) m	0.2	0.2	0.2	0.2
Temp. °C	4	6	11	16	18	14	11	9
Precip. %	20	20	20	20	20	0	0	0

Tonight: Partly cloudy with 30 percent chance of showers this evening. Becoming clear overnight. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 4.

Weather: London (local forecast), as of 3:06 a.m. EDT

Sun and moon

Civil dawn: 7:02 a.m.
Sunrise: 7:31 a.m.
Sunset: 6:51 p.m.
Civil dusk: 7:20 p.m.
Moonrise: 6:24 a.m.
Moonset: 6:10 p.m.
Moon: Waning crescent, 1% lit

Air Quality Health Index

1 low risk

London, as of 2:00 a.m. EDT

Follow this lake by email: a weekly summary of conditions.

Depth

44% of Fanshawe Lake is shallower than 3 m, and 29% is deeper than 5 m.

0 m3 m6 m9 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 10.7 m, drawn from 12 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 23 government surveys (2008–2015) that recorded them.

Yellow Perch17 of 23
Walleye15 of 23
Pumpkinseed6 of 23
Rock Bass6 of 23
Largemouth Bass4 of 23
Smallmouth Bass3 of 23

Forage fish and other species (14)

Forage fish

Spotfin Shiner 5
Striped Shiner 5
Golden Shiner 4
Blackside Darter 1
Bluntnose Minnow 1
Greenside Darter 1
Iowa Darter 1

Other

Golden Redhorse 17
Greater Redhorse 14
Common Carp 9
Black Bullhead 6
White Sucker 5
Yellow Bullhead 3
Quillback 1

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 7 species from Fanshawe Lake. Maximum meals per month:

Species	Length	General population	Sensitive population*	Contaminant
Largemouth Bass	30-35 cm	16	8	Mercury
Rock Bass	15-20 cm	16	8	Mercury
Smallmouth Bass	35-40 cm	8	4	Mercury
Walleye	40-45 cm	16	8	Mercury
Common Carp	55-60 cm	16	8	Mercury
Redhorse Sucker	45-50 cm	16	4	Mercury
White Sucker	35-40 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 16. Check seasons and limits before you fish.