Rock Island Lake
45.5532° N, 80.2575° W
Rock Island Lake, Ontario. 45.5532° N, 80.2575° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/rock-island-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.
- Fisheries Management Zones, Ontario Ministry of Natural Resources. 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).
Rock Island Lake covers 2.3 km², Ontario. It lies 29 km northwest of Parry Sound.
Government surveys have recorded 3 fish species here: brassy minnow, brook stickleback and central mudminnow.
- Area
- 2.3 km²
- Shoreline
- 24.6 km
- Fish species
- 3
- Elevation
- 202 m
Today on the water
9.2 °C
Observed at Parry Sound, as of 4:00 a.m. EDT
Wind from the west: the west shore is the sheltered side.
| Time | 5 a.m. | 8 a.m. | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 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 | ||||||
| Temp. °C | 5 | 7 | 10 | 13 | 14 | 9 | 5 | 3 |
| Precip. % | 40 | 40 | 40 | 20 | 20 | 0 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 5.
Weather: Parry Sound (local forecast), as of 4:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:59 a.m.
- Sunrise
- 7:29 a.m.
- Sunset
- 6:46 p.m.
- Civil dusk
- 7:15 p.m.
- Moonrise
- 6:21 a.m.
- Moonset
- 6:04 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Parry Sound, as of 4:00 a.m. EDT
Follow this lake by email: a weekly summary of conditions.
Fish
Other species (3)
- Brassy Minnow 1
- Brook Stickleback 1
- Central Mudminnow 1
Numbers are the surveys that recorded each species.
Fishing regulations: Fisheries Management Zone 15. Check seasons and limits before you fish.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.