Greenbush Lake
50.9509° N, 90.1047° W
Depth contours from the 1978 government survey. Not for navigation.
Download the depth map (SVG)Greenbush Lake, Ontario. 50.9509° N, 90.1047° W
Maximum depth 8 m (1978 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/greenbush-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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Greenbush Lake is 8 m deep at its deepest point, shallower than 79% of the 2,688 surveyed lakes in Ontario. It covers 29.7 km² and lies 24 km southeast of Rat Rapids.
Government surveys have recorded 10 fish species here, including walleye, northern pike and yellow perch.
- Maximum depth
- 8 msurveyed 1978
- shallower than 79% of the 2,688 surveyed lakes in Ontario
- Area
- 29.7 km²
- larger than 98% of the 18,731 lakes in Ontario
- Shoreline
- 136 km
- longer than 98% of the 18,731 lakes in Ontario
- Fish species
- 10
- more than 73% of the 2,454 surveyed lakes in Ontario
- Elevation
- 378 m
Today on the water
-2.5 °C
Observed at Armstrong, as of 5:00 a.m. CDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 6 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.
| Time | 6 a.m. | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. | 3 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 10 | var. 5 | var. 5 | var. 5 | SE 10 | S 15 | SE 20 | SE 20 |
| Gusts km/h | 40 | 40 | ||||||
| Waves (est.) m | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | |||
| Temp. °C | -3 | 2 | 8 | 11 | 9 | 7 | 4 | 4 |
| Precip. % | 20 | 20 | 20 | 20 | 60 | 60 | 60 | 20 |
Today: Increasing cloudiness early this morning. Wind up to 15 km/h. High 12. Wind chill minus 7 this morning. UV index 2 or low.
Weather: Armstrong (local forecast), as of 5:02 a.m. CDT
Sun and moon
- Civil dawn
- 6:40 a.m.
- Sunrise
- 7:14 a.m.
- Sunset
- 6:20 p.m.
- Civil dusk
- 6:53 p.m.
- Moonrise
- 6:06 a.m.
- Moonset
- 5:39 p.m.
- Moon
- Waning crescent, 1% lit
Depth
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 1978 records a maximum depth of 8 m, drawn from 101 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 19 government surveys (2009–2009) that recorded them.
Forage fish and other species (4)
Forage fish
- Spottail Shiner 7
- Trout-Perch 2
- Blacknose Shiner 1
Other
- White Sucker 13
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 4 species from Greenbush Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Whitefish | 45-50 cm | 16 | 16 | Precautionary |
| Northern Pike | 55-60 cm | 16 | 4 | Mercury |
| Walleye | 40-45 cm | 8 | Do not eat | Mercury |
| White Sucker | 45-50 cm | 16 | 12 | Precautionary |
* 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 4. Check seasons and limits before you fish.