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Map of Round Lake

Round Lake

46.3268° N, 81.1965° W

Shoreline and neighbouring water from open government data.

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Round Lake, Ontario. 46.3268° N, 81.1965° W

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/round-lake-near-grand-sudbury/, 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.
  • 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.

Round Lake covers 5.88 km², making it larger than 92% of the 18,731 lakes in Ontario. It lies 6.9 km south of Naughton.

Government surveys have recorded 8 fish species here, including smallmouth bass, yellow perch and northern pike.

Area
5.88 km²
larger than 92% of the 18,731 lakes in Ontario
Shoreline
14.7 km
longer than 83% of the 18,731 lakes in Ontario
Fish species
8
more than 65% of the 2,454 surveyed lakes in Ontario
Elevation
219 m

Today on the water

5.5 °C

Mostly CloudyWind SW 14 km/h

Observed at Greater Sudbury, as of 6:00 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.

Time7 a.m.10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.4 a.m.
Wind km/hvar. 5NW 15NW 20NW 20NW 20var. 5SE 10SE 10
Gusts km/h404040
Waves (est.) m0.10.20.20.2
Temp. °C5710118631
Precip. %303030200000

Today: Cloudy with 30 percent chance of showers this morning and early this afternoon then a mix of sun and cloud. Wind becoming northwest 20 km/h gusting to 40 late this morning. High 11. UV index 3 or moderate.

Weather: Greater Sudbury (local forecast), as of 6:05 a.m. EDT

Sun and moon

Civil dawn
7:03 a.m.
Sunrise
7:34 a.m.
Sunset
6:49 p.m.
Civil dusk
7:19 p.m.
Moonrise
6:26 a.m.
Moonset
6:07 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

1 low risk

Sudbury, as of 4:00 a.m. EDT

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Fish

Sport fish by the share of the 10 government surveys that recorded them.

  • Smallmouth Bass5 of 10
  • Yellow Perch5 of 10
  • Northern Pike4 of 10
  • Walleye2 of 10
  • Rock Bass1 of 10
Forage fish and other species (3)

Forage fish

  • Rainbow Smelt 4

Other

  • White Sucker 2
  • Brown Bullhead 1

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 5 species from Round Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Northern Pike55-60 cm164Mercury
Smallmouth Bass35-40 cm124Mercury
Walleye40-45 cm124Mercury
Cisco (Lake Herring)30-35 cm88Chromium
Rainbow Smelt15-20 cm168Mercury

* 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 10. Check seasons and limits before you fish.