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Map of Thirty Lake

Thirty Lake

45.5301° N, 79.0363° W

Shoreline and neighbouring water from open government data.

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Thirty Lake, Ontario. 45.5301° N, 79.0363° W

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/thirty-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.
  • 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).

Thirty Lake covers 0.2 km², making it smaller than 80% of the 18,731 lakes in Ontario. It lies 12 km southeast of Kearney.

Government surveys have recorded 5 fish species here, including pumpkinseed and yellow perch.

Area
0.2 km²
smaller than 80% of the 18,731 lakes in Ontario
Shoreline
3 km
shorter than 75% of the 18,731 lakes in Ontario
Fish species
5
more than 53% of the 2,454 surveyed lakes in Ontario
Elevation
393 m

Today on the water

5 °C

Wind WSW 3 km/h

Observed at Oxtongue Lake, as of 8:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Time9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.3 a.m.6 a.m.
Wind km/hW 15NW 30NW 30NW 15var. 5var. 5var. 5var. 5
Gusts km/h5050
Waves (est.) m0.10.20.20.10.1
Temp. °C59121161-2-2
Precip. %404020200000

Today: A mix of sun and cloud. 40 percent chance of showers this morning and early this afternoon. Wind becoming northwest 30 km/h gusting to 50 near noon. High 13. UV index 4 or moderate.

Weather: Oxtongue Lake (local forecast), as of 8:03 a.m. EDT

Sun and moon

Civil dawn
6:55 a.m.
Sunrise
7:24 a.m.
Sunset
6:41 p.m.
Civil dusk
7:10 p.m.
Moonrise
6:16 a.m.
Moonset
5:59 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

1 low risk

Dorset, as of 8:00 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 1 government surveys (2007–2007) that recorded them.

  • Pumpkinseed1 of 1
  • Yellow Perch1 of 1
Forage fish and other species (3)
  • Common Shiner 1
  • Creek Chub 1
  • Northern Redbelly Dace 1

Numbers are the surveys that recorded each species.

Fishing regulations: Fisheries Management Zone 15. Check seasons and limits before you fish.