Groom Lake
45.5391° N, 79.1839° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Groom Lake, Ontario. 45.5391° N, 79.1839° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/groom-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.
- 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).
- 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).
Groom Lake covers 0.59 km², making it larger than 55% of the 18,731 lakes in Ontario. It lies 5.1 km north of Swindon.
- Area
- 0.59 km²
- larger than 55% of the 18,731 lakes in Ontario
- Shoreline
- 6.4 km
- longer than 59% of the 18,731 lakes in Ontario
- Water clarity
- 3.7 mSecchi depth, 2025
- clearer than 54% of the 1,251 monitored lakes in Ontario
- Elevation
- 360 m
Today on the water
7.4 °C
Observed at Burk's Falls, as of 9:00 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 | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. | 7 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.2 | 0.2 | 0.1 | ||||
| Temp. °C | 7 | 11 | 13 | 10 | 5 | 1 | -1 | 2 |
| Precip. % | 40 | 40 | 20 | 20 | 0 | 0 | 0 | 0 |
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: Burk's Falls (local forecast), as of 9:01 a.m. EDT
Sun and moon
- Civil dawn
- 6:55 a.m.
- Sunrise
- 7:25 a.m.
- Sunset
- 6:41 p.m.
- Civil dusk
- 7:11 p.m.
- Moonrise
- 6:17 a.m.
- Moonset
- 6:00 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Dorset, as of 8:00 a.m. EDT
Water
Clarity was measured with a Secchi disk in 21 years between 2004 and 2025; the latest annual mean is 3.7 m.
Getting on the water
1 listed access point.
- Shore access