Otter Lake
44.7838° N, 76.1239° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Otter Lake, Ontario. 44.7838° N, 76.1239° 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 Depths are from government surveys and may be outdated.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/otter-lake-near-perth/, 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).
Otter Lake is 36.6 m deep at its deepest point, deeper than 85% of the 2,688 surveyed lakes in Ontario. It covers 5.77 km² and lies beside Frayn's Landing.
Government surveys have recorded 1 fish species here: splake.
- Maximum depth
- 36.6 m
- deeper than 85% of the 2,688 surveyed lakes in Ontario
- Area
- 5.77 km²
- larger than 92% of the 18,731 lakes in Ontario
- Shoreline
- 18.9 km
- longer than 87% of the 18,731 lakes in Ontario
- Water clarity
- 5.6 mSecchi depth, 2025
- clearer than 86% of the 1,251 monitored lakes in Ontario
- Fish species
- 1
- fewer than 100% of the 2,454 surveyed lakes in Ontario
- Elevation
- 121 m
Today on the water
7.9 °C
Observed at Smiths Falls, as of 2:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m.
| Time | 3 a.m. | 6 a.m. | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | W 15 | NW 30 | NW 30 | NW 15 | NW 10 | NW 10 |
| Gusts | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.3 | ||||
| Temp. °C | 5 | 5 | 7 | 11 | 13 | 12 | 7 | 3 |
| Precip. % | 20 | 40 | 40 | 40 | 40 | 20 | 20 | 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: Smiths Falls (local forecast), as of 2:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:43 a.m.
- Sunrise
- 7:12 a.m.
- Sunset
- 6:30 p.m.
- Civil dusk
- 6:59 p.m.
- Moonrise
- 6:04 a.m.
- Moonset
- 5:48 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
2 low risk
Kingston, as of 1:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Depth
25% of Otter 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 90 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
- SplakeStocked
Stocking
Splake13,571 fish in 3 years, most recently 2025
All stocking records (3)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2025 | Splake | 5,000 | Yearlings |
| 2023 | Splake | 5,000 | Yearlings |
| 2020 | Splake | 3,571 | Yearlings |
Fishing regulations: Fisheries Management Zone 18. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 15 years between 1996 and 2025; the latest annual mean is 5.6 m.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.