Upper Rideau Lake
44.681° N, 76.3397° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Upper Rideau Lake, Ontario. 44.681° N, 76.3397° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/upper-rideau-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.
- 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.
- Ontario Waterbody Location Identifier, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
Upper Rideau Lake covers 14.6 km², making it larger than 97% of the 18,731 lakes in Ontario. It lies beside Westport.
Government surveys have recorded 1 fish species here: smallmouth bass.
- Area
- 14.6 km²
- larger than 97% of the 18,731 lakes in Ontario
- Shoreline
- 43.6 km
- longer than 95% of the 18,731 lakes in Ontario
- Water clarity
- 4.1 mSecchi depth, 2025
- clearer than 63% of the 1,251 monitored lakes in Ontario
- Fish species
- 1
- fewer than 100% of the 2,454 surveyed lakes in Ontario
- Elevation
- 122 m
Today on the water
10.2 °C
Observed at Westport, as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.4 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 | 0.4 | ||||
| Temp. °C | 4 | 5 | 9 | 12 | 14 | 11 | 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: Westport (local forecast), as of 3:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:43 a.m.
- Sunrise
- 7:13 a.m.
- Sunset
- 6:31 p.m.
- Civil dusk
- 7:00 p.m.
- Moonrise
- 6:04 a.m.
- Moonset
- 5:49 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
2 low risk
Kingston, as of 2:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Fish
Sport fish by the share of the 1 government surveys (2015–2015) that recorded them.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 10 species from Upper Rideau Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Black Crappie | 20-25 cm | 16 | 8 | Mercury |
| Bluegill | 15-20 cm | 16 | 16 | Precautionary |
| Largemouth Bass | 30-35 cm | 16 | 4 | Mercury |
| Northern Pike | 55-60 cm | 8 | 4 | Mercury |
| Pumpkinseed | 15-20 cm | 16 | 16 | Precautionary |
| Rock Bass | 15-20 cm | 16 | 12 | Precautionary |
| Smallmouth Bass | 35-40 cm | 12 | 4 | Mercury |
| Walleye | 50-55 cm | 8 | Do not eat | Mercury |
| Yellow Perch | 20-25 cm | 16 | 12 | Precautionary |
| Brown Bullhead | 25-30 cm | 16 | 16 | 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 18. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 30 years between 1996 and 2025; the latest annual mean is 4.1 m.
Getting on the water
4 listed boat launches. marks launches on the map.
Southeast shore
- Boat launch
South shore
- Boat launch
- Boat launch
Southwest shore
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.