Opeongo Lake (Ontario): Depth Map, Fishing & Boat Launches

Map of Opeongo Lake — Opeongo Lake
45.712° N, 78.3711° W

Shoreline and neighbouring water from open government data.

Opeongo Lake, Ontario. 45.712° N, 78.3711° W

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/opeongo-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.
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.

Opeongo Lake covers 59.4 km², making it larger than 99% of the 18,731 lakes in Ontario. It lies 18 km northwest of Whitney.

Government surveys have recorded 15 fish species here, including lake trout, brook trout and cisco.

Area: 59.4 km²; larger than 99% of the 18,731 lakes in Ontario
Shoreline: 172 km; longer than 99% of the 18,731 lakes in Ontario
Fish species: 15; more than 89% of the 2,454 surveyed lakes in Ontario
Elevation: 403 m

Today on the water

4.8 °C

Wind W 4 km/h

Observed at Algonquin Park (Lake of Two Rivers), as of 3:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.5 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	0.5
Temp. °C	1	2	6	10	12	9	4	-1
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 west 30 km/h gusting to 50 becoming light this evening. Low plus 1.

Weather: Algonquin Park (Lake of Two Rivers) (local forecast), as of 3:03 a.m. EDT

Sun and moon

Civil dawn: 6:52 a.m.
Sunrise: 7:22 a.m.
Sunset: 6:38 p.m.
Civil dusk: 7:08 p.m.
Moonrise: 6:13 a.m.
Moonset: 5:56 p.m.
Moon: Waning crescent, 1% lit

Air Quality Health Index

2 low risk

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

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

Fish

Sport fish by the share of the 8 government surveys (2024–2024) that recorded them.

Lake Trout7 of 8
Brook Trout1 of 8
Cisco1 of 8
Pumpkinseed1 of 8
Smallmouth Bass1 of 8
Yellow Perch1 of 8

Forage fish and other species (9)

Forage fish

Blacknose Shiner 1
Bluntnose Minnow 1
Brassy Minnow 1
Common Shiner 1
Creek Chub 1
Golden Shiner 1
Northern Pearl Dace 1

Other

Brown Bullhead 1
White Sucker 1

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 6 species from Opeongo Lake. Maximum meals per month:

Species	Length	General population	Sensitive population*	Contaminant
Brook Trout	30-35 cm	16	4	Mercury
Lake Trout	50-55 cm	4	Do not eat	Mercury
Lake Whitefish	45-50 cm	12	8	PCB
Smallmouth Bass	35-40 cm	4	Do not eat	Mercury
Burbot (Ling)	50-55 cm	4	Do not eat	Mercury
Round Whitefish	35-40 cm	16	12	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 15. Check seasons and limits before you fish.