Rathbun Lake
44.7772° N, 78.2031° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Rathbun Lake, Ontario. 44.7772° N, 78.2031° W
Maximum depth 36.6 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/rathbun-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.
- Fish stocking for recreational purposes, 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).
Rathbun Lake is 36.6 m deep at its deepest point, deeper than 85% of the 2,688 surveyed lakes in Ontario. It covers 1.17 km² and lies 8.9 km west of Apsley.
Government surveys have recorded 1 fish species here: lake trout.
- Maximum depth
- 36.6 m
- deeper than 85% of the 2,688 surveyed lakes in Ontario
- Area
- 1.17 km²
- larger than 71% of the 18,731 lakes in Ontario
- Shoreline
- 10 km
- longer than 74% of the 18,731 lakes in Ontario
- Fish species
- 1
- fewer than 100% of the 2,454 surveyed lakes in Ontario
- Elevation
- 322 m
Today on the water
4.2 °C
Observed at Apsley, as of 7:00 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 | 8 a.m. | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 a.m. | 5 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.2 | 0.2 | ||||
| Temp. °C | 6 | 10 | 13 | 14 | 8 | 4 | 1 | 0 |
| 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 14. UV index 4 or moderate.
Weather: Apsley (local forecast), as of 7:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:51 a.m.
- Sunrise
- 7:20 a.m.
- Sunset
- 6:38 p.m.
- Civil dusk
- 7:07 p.m.
- Moonrise
- 6:12 a.m.
- Moonset
- 5:57 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Peterborough, as of 6:00 a.m. EDT
Depth
24% of Rathbun Lake is deeper than 20 m.
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 records a maximum depth of 36.6 m, drawn from 30 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
- Lake TroutStocked
Stocking
Lake Trout4,148 fish in 5 years, most recently 2024
All stocking records (5)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2024 | Lake Trout | 748 | Yearlings |
| 2022 | Lake Trout | 850 | Yearlings |
| 2020 | Lake Trout | 850 | Yearlings |
| 2018 | Lake Trout | 850 | Yearlings |
| 2016 | Lake Trout | 850 | Yearlings |
Fishing regulations: Fisheries Management Zone 15. Check seasons and limits before you fish.