Rocky Island Lake
Historical data onlyThe monitoring station for this lake is no longer active, so live water levels are not available. Historical seasonal patterns and other lake information are shown below.
Current Weather
2d ago18°CCloudy
Wind NNW 15 km/h
Humidity 58%
A mix of sun and cloud
Environment Canada — Elliot Lake - Ranger Lake
Typical Range for Today
406.82 – 408.05 m
25th to 75th percentile (normal range)
Historical Min / Max for Today
398.15 – 408.77 m
Based on 20 years of records
Fish Consumption Advisories (4 species)
The following consumption advisories are in effect for fish caught in Rocky Island Lake.
⚠Lake Whitefish
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercury | 40-45 cm | 8/month | 4/month |
| Mercury | 45-50 cm | 4/month | Do not eat |
| Mercury | 50-55 cm | 4/month | Do not eat |
⚠Northern Pike
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercury | 50-55 cm | 4/month | Do not eat |
| Mercury | 55-60 cm | 4/month | Do not eat |
| Mercury | 60-65 cm | 4/month | Do not eat |
| Mercury | 65-70 cm | 2/month | Do not eat |
| Mercury | 70-75 cm | 2/month | Do not eat |
⚠Walleye
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercury | 55-60 cm | 2/month | Do not eat |
| Mercury | 30-35 cm | 4/month | Do not eat |
| Mercury | 35-40 cm | 4/month | Do not eat |
| Mercury | 40-45 cm | 4/month | Do not eat |
| Mercury | 45-50 cm | 4/month | Do not eat |
| Mercury | 50-55 cm | 4/month | Do not eat |
White Sucker
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercury | 40-45 cm | 16/month | 8/month |
| Mercury | 45-50 cm | 16/month | 4/month |
| Mercury | 35-40 cm | 16/month | 8/month |
Source: Guide to Eating Ontario Fish (2025). Advisory data is updated annually.
Lake Profile
Est. average depth30.4 m
Estimated from HydroLAKES v1.0 (Messager et al., 2016). Modeled geo-statistical estimate, not a direct survey measurement.
Boat Launches (5)
Source: Ontario MNR Fishing Access Points. Verify conditions before visiting.
Technical details
- Years of record
- 20
- Source station
- MISSISSAGI RIVER AT ROCKY ISLAND LAKE (02CB002)
- Est. average depth
- 30.4 m
- Station status
- Discontinued
- Relationship type
- lake_outlet
- Mapping confidence
- medium
- Today's normal range
- 406.82–408.05 m
- Same-date historical range
- 398.15–408.77 m
Data source: ECCC Water Office — Station 02CB002. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.