Round Lake
45.6407° N, 77.5289° W
Depth contours from the 2005 government survey. Not for navigation.
Download the depth map (SVG)Round Lake, Ontario. 45.6407° N, 77.5289° W
Maximum depth 50 m (2005 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/round-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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Round Lake is 50 m deep at its deepest point, deeper than 94% of the 2,688 surveyed lakes in Ontario. It covers 29.8 km² and lies beside Bonnechere.
Government surveys have recorded 22 fish species here, including yellow perch, rock bass and northern pike.
- Maximum depth
- 50 msurveyed 2005
- deeper than 94% of the 2,688 surveyed lakes in Ontario
- Area
- 29.8 km²
- larger than 98% of the 18,731 lakes in Ontario
- Shoreline
- 35.1 km
- longer than 93% of the 18,731 lakes in Ontario
- Water clarity
- 3.3 mSecchi depth, 2025
- less clear than 56% of the 1,251 monitored lakes in Ontario
- Fish species
- 22
- more than 98% of the 2,454 surveyed lakes in Ontario
- Elevation
- 166 m
Today on the water
4.9 °C
Observed at Barry's Bay, 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.
| 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 | 2 | 3 | 7 | 11 | 13 | 10 | 5 | 0 |
| 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 2.
Weather: Barry's Bay (local forecast), as of 3:00 a.m. EDT
Sun and moon
- Civil dawn
- 6:49 a.m.
- Sunrise
- 7:18 a.m.
- Sunset
- 6:35 p.m.
- Civil dusk
- 7:04 p.m.
- Moonrise
- 6:10 a.m.
- Moonset
- 5:53 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
4% of Round Lake is deeper than 30 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 2005 records a maximum depth of 50 m, drawn from 63 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 80 government surveys (2008–2019) that recorded them.
Forage fish and other species (10)
Forage fish
- Rainbow Smelt 37
- Trout-Perch 9
- Spottail Shiner 5
- Common Shiner 4
- Logperch 4
- Fallfish 2
Other
- White Sucker 27
- Brown Bullhead 5
- Silver Redhorse 5
- Greater Redhorse 2
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 9 species from Round Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 4 | Do not eat | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 8 | Mercury |
| Northern Pike | 55-60 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 |
| Burbot (Ling) | 50-55 cm | 4 | Do not eat | Mercury |
| Cisco (Lake Herring) | 30-35 cm | 4 | Do not eat | Mercury |
| Rainbow Smelt | 15-20 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 15. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 21 years between 2003 and 2025; the latest annual mean is 3.3 m.
Getting on the water
4 listed boat launches. marks launches on the map.
North shore
- Boat launch
South shore
- Boat launch
West shore
- Boat launch
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.