Sydenham Lake
44.4307° N, 76.5567° W
Depth contours from the 1967 government survey. Not for navigation.
Download the depth map (SVG)Sydenham Lake, Ontario. 44.4307° N, 76.5567° W
Maximum depth 33.5 m (1967 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/sydenham-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.
Sydenham Lake is 33.5 m deep at its deepest point, deeper than 83% of the 2,688 surveyed lakes in Ontario. It covers 7.22 km² and lies beside Moons Corners.
Government surveys have recorded 16 fish species here, including yellow perch, bluegill and largemouth bass.
- Maximum depth
- 33.5 msurveyed 1967
- deeper than 83% of the 2,688 surveyed lakes in Ontario
- Area
- 7.22 km²
- larger than 94% of the 18,731 lakes in Ontario
- Shoreline
- 45.6 km
- longer than 95% of the 18,731 lakes in Ontario
- Water clarity
- 5.7 mSecchi depth, 2024
- clearer than 87% of the 1,251 monitored lakes in Ontario
- Fish species
- 16
- more than 91% of the 2,454 surveyed lakes in Ontario
- Elevation
- 131 m
Today on the water
10.4 °C
Observed at Sydenham, as of 9:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 10 a.m., wind from the west: the west shore is sheltered, waves build toward the east 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 | 0.2 | 0.2 | 0.2 | 0.1 | ||||
| Temp. °C | 10 | 13 | 15 | 12 | 7 | 2 | 0 | 1 |
| 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 15. UV index 4 or moderate.
Weather: Sydenham (local forecast), as of 9:03 a.m. EDT
Sun and moon
- Civil dawn
- 6:44 a.m.
- Sunrise
- 7:13 a.m.
- Sunset
- 6:32 p.m.
- Civil dusk
- 7:01 p.m.
- Moonrise
- 6:05 a.m.
- Moonset
- 5:50 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Kingston, as of 8:00 a.m. EDT
Depth
52% of Sydenham Lake is shallower than 3 m, and 12% 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 1967 records a maximum depth of 33.5 m, drawn from 15 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 28 government surveys (2008–2010) that recorded them.
Forage fish and other species (7)
Forage fish
- Golden Shiner 11
- Common Shiner 6
- Banded Killifish 1
- Central Mudminnow 1
- Hornyhead Chub 1
Other
- Brown Bullhead 14
- Yellow Bullhead 9
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 4 species from Sydenham Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Black Crappie | 20-25 cm | 16 | 4 | Mercury |
| Northern Pike | 55-60 cm | 8 | Do not eat | Mercury |
| Smallmouth Bass | 35-40 cm | 8 | 4 | Mercury |
| Yellow Perch | 15-20 cm | 8 | 4 | 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 18. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 8 years between 1996 and 2024; the latest annual mean is 5.7 m.
Getting on the water
2 listed boat launches. marks launches on the map.
Northeast shore
- Boat launch
Southwest shore
- Boat launch