Chalk Lake
44.0231° N, 79.0453° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Chalk Lake, Ontario. 44.0231° N, 79.0453° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/chalk-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.
- Lake Partner Program, Ontario Ministry of the Environment, Conservation and Parks. 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).
Chalk Lake covers 0.2 km², making it smaller than 80% of the 18,731 lakes in Ontario. It lies 2.1 km northeast of Glen Major.
Government surveys have recorded 6 fish species here, including largemouth bass and pumpkinseed.
- Area
- 0.2 km²
- smaller than 80% of the 18,731 lakes in Ontario
- Shoreline
- 2.8 km
- shorter than 77% of the 18,731 lakes in Ontario
- Water clarity
- 5 mSecchi depth, 2025
- clearer than 79% of the 1,251 monitored lakes in Ontario
- Fish species
- 6
- more than 57% of the 2,454 surveyed lakes in Ontario
- Elevation
- 287 m
Today on the water
7.5 °C
Observed at Port Perry, as of 3:00 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.
| 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 | 0.1 | 0.1 | 0.1 | 0.2 | ||||
| Temp. °C | 5 | 6 | 10 | 14 | 16 | 13 | 8 | 5 |
| Precip. % | 20 | 40 | 40 | 40 | 20 | 20 | 0 | 0 |
Tonight: Partly cloudy. 40 percent chance of showers this evening. Wind northwest 30 km/h gusting to 50 becoming light this evening. Low plus 5.
Weather: Port Perry (local forecast), as of 3:03 a.m. EDT
Sun and moon
- Civil dawn
- 6:54 a.m.
- Sunrise
- 7:23 a.m.
- Sunset
- 6:42 p.m.
- Civil dusk
- 7:11 p.m.
- Moonrise
- 6:16 a.m.
- Moonset
- 6:01 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Oshawa, 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 4 government surveys (1971–1977) that recorded them.
Forage fish and other species (4)
- Bluntnose Minnow 1
- Creek Chub 1
- Fathead Minnow 1
- Northern Redbelly Dace 1
Numbers are the surveys that recorded each species.
Fishing regulations: Fisheries Management Zone 17. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 21 years between 1997 and 2025; the latest annual mean is 5 m.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.