Anstruther Lake
44.7434° N, 78.2099° W
Depth contours from the 1983 government survey. Not for navigation.
Download the depth map (SVG)Anstruther Lake, Ontario. 44.7434° N, 78.2099° W
Maximum depth 39 m (1983 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/anstruther-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.
- 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
- Photographs, Wikimedia Commons contributors. Each photo carries its own licence (CC0, public domain, CC BY or CC BY-SA), credited where shown.
Anstruther Lake is 39 m deep at its deepest point, deeper than 88% of the 2,688 surveyed lakes in Ontario. It covers 6.47 km² and lies 7.4 km west of Apsley.
Government surveys have recorded 11 fish species here, including lake trout, smallmouth bass and walleye.
- Maximum depth
- 39 msurveyed 1983
- deeper than 88% of the 2,688 surveyed lakes in Ontario
- Area
- 6.47 km²
- larger than 93% of the 18,731 lakes in Ontario
- Shoreline
- 38.5 km
- longer than 94% of the 18,731 lakes in Ontario
- Water clarity
- 4.8 mSecchi depth, 2024
- clearer than 77% of the 1,251 monitored lakes in Ontario
- Fish species
- 11
- more than 81% of the 2,454 surveyed lakes in Ontario
- Elevation
- 298 m
Today on the water
4.9 °C
Observed at Apsley, as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 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 | 0.2 | 0.2 | 0.2 | 0.3 | ||||
| Temp. °C | 4 | 5 | 9 | 12 | 14 | 10 | 5 | 2 |
| Precip. % | 20 | 40 | 40 | 40 | 20 | 20 | 0 | 0 |
Tonight: Partly cloudy. 60 percent chance of showers this evening. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 4.
Weather: Apsley (local forecast), as of 3:00 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
2 low risk
Peterborough, as of 2:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
25% of Anstruther Lake is shallower than 3 m, and 20% 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 from 1983 records a maximum depth of 39 m, drawn from 77 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 16 government surveys (1899–2015) that recorded them.
Forage fish and other species (2)
Forage fish
- Golden Shiner 1
Other
- White Sucker 12
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 4 species from Anstruther Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 8 | Do not eat | Mercury |
| Smallmouth Bass | 35-40 cm | 4 | Do not eat | Mercury |
| Walleye | 45-50 cm | 8 | 4 | Mercury |
| White Sucker | 40-45 cm | 16 | 8 | Mercury |
* 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 15. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 26 years between 1990 and 2024; the latest annual mean is 4.8 m.
Getting on the water
1 listed boat launch. marks launches on the map.
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.