Moira Lake (Ontario): Depth Map, Fishing, Boat Launches & Water Quality

Map of Moira Lake with depth contours — Moira Lake
44.4871° N, 77.4537° W

Depth contours from the 1969 government survey. Not for navigation.

Moira Lake, Ontario. 44.4871° N, 77.4537° W

Maximum depth 9.1 m (1969 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/moira-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.
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.
Photographs, Wikimedia Commons contributors. Each photo carries its own licence (CC0, public domain, CC BY or CC BY-SA), credited where shown.

Moira Lake is 9.1 m deep at its deepest point, shallower than 76% of the 2,688 surveyed lakes in Ontario. It covers 8.53 km² and lies 1.7 km east of Madoc.

Government surveys have recorded 17 fish species here, including yellow perch, walleye and bluegill.

Maximum depth: 9.1 msurveyed 1969; shallower than 76% of the 2,688 surveyed lakes in Ontario
Area: 8.53 km²; larger than 94% of the 18,731 lakes in Ontario
Shoreline: 30.4 km; longer than 92% of the 18,731 lakes in Ontario
Water clarity: 2.7 mSecchi depth, 2025; less clear than 69% of the 1,251 monitored lakes in Ontario
Fish species: 17; more than 93% of the 2,454 surveyed lakes in Ontario
Elevation: 153 m

Today on the water

9.9 °C

ClearWind W 9 km/h

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

choppy Estimated waves, next 12 hours: up to 0.3 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast 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 30	NW 30	NW 15	var. 5	var. 5
Gusts km/h				50	50
Waves (est.) m	0.2	0.2	0.2	0.3	0.3
Temp. °C	5	6	10	13	15	12	7	3
Precip. %	20	40	40	40	20	20	0	0

Tonight: Partly cloudy. 40 percent chance of showers this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 5.

Weather: Stirling (local forecast), as of 3:02 a.m. EDT

Sun and moon

Civil dawn: 6:48 a.m.
Sunrise: 7:17 a.m.
Sunset: 6:35 p.m.
Civil dusk: 7:04 p.m.
Moonrise: 6:09 a.m.
Moonset: 5:54 p.m.
Moon: Waning crescent, 1% lit

Air Quality Health Index

2 low risk

Belleville, as of 3:00 a.m. EDT

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

Depth

36% of Moira Lake is shallower than 3 m, and 34% 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 1969 records a maximum depth of 9.1 m, drawn from 16 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 27 government surveys (2008–2010) that recorded them.

Yellow Perch23 of 27
Walleye21 of 27
Bluegill18 of 27
Pumpkinseed18 of 27
Rock Bass16 of 27
Smallmouth Bass12 of 27
Largemouth Bass6 of 27
Northern Pike3 of 27
Muskellunge1 of 27

Forage fish and other species (8)

Forage fish

Golden Shiner 4
Logperch 3
Bluntnose Minnow 1

Other

Longnose Gar 7
White Sucker 7
Shorthead Redhorse 5
Brown Bullhead 1
Greater Redhorse 1

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 11 species from Moira Lake. Maximum meals per month:

Species	Length	General population	Sensitive population*	Contaminant
Black Crappie	20-25 cm	12	8	PFAS
Bluegill	15-20 cm	16	8	Mercury
Largemouth Bass	30-35 cm	4	Do not eat	Mercury
Northern Pike	55-60 cm	4	Do not eat	Mercury
Pumpkinseed	15-20 cm	8	4	Mercury
Rock Bass	15-20 cm	4	Do not eat	Mercury
Smallmouth Bass	35-40 cm	4	Do not eat	Mercury
Walleye	40-45 cm	4	Do not eat	Mercury
Yellow Perch	20-25 cm	4	Do not eat	Mercury
Brown Bullhead	25-30 cm	16	8	Arsenic, Mercury
White Sucker	35-40 cm	16	12	Arsenic

* 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.