Lake St. Joseph

Historical data only

The monitoring station for this lake is no longer active, so live water levels are not available.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 ago

12°CSunny

Wind NW 8 km/h

Humidity 53%

Sunny

Environment Canada — Pickle Lake - Wunnummin Lake

Typical Range for Today

373.04 – 373.69 m

25th to 75th percentile (normal range)

Historical Min / Max for Today

371.46 – 374.31 m

Based on 60 years of records

Fish Consumption Advisories (5 species)

The following consumption advisories are in effect for fish caught in Lake St. Joseph.

Cisco (Lake Herring)

Contaminant	Size	General pop.	Sensitive pop.
	25-30 cm	32/month	—
Mercury	25-30 cm	—	16/month

Lake Whitefish

Contaminant	Size	General pop.	Sensitive pop.
	30-35 cm	32/month	32/month

⚠Northern Pike

Contaminant	Size	General pop.	Sensitive pop.
Mercury	55-60 cm	12/month	4/month
Mercury	60-65 cm	12/month	4/month
Mercury	65-70 cm	8/month	4/month
Mercury	70-75 cm	8/month	Do not eat
Mercury	>75 cm	4/month	Do not eat
Mercury	40-45 cm	16/month	8/month
Mercury	45-50 cm	16/month	8/month
Mercury	50-55 cm	16/month	4/month

⚠Walleye

Contaminant	Size	General pop.	Sensitive pop.
Mercury	55-60 cm	4/month	Do not eat
Mercury	50-55 cm	4/month	Do not eat
Mercury	25-30 cm	16/month	8/month
Mercury	30-35 cm	16/month	8/month
Mercury	35-40 cm	16/month	4/month
Mercury	40-45 cm	12/month	4/month
Mercury	45-50 cm	8/month	Do not eat

White Sucker

Contaminant	Size	General pop.	Sensitive pop.
	40-45 cm	32/month	—
	45-50 cm	32/month	—
	35-40 cm	32/month	—
Mercury	35-40 cm	—	16/month
Mercury	40-45 cm	—	16/month
Mercury	45-50 cm	—	12/month
Mercury	50-55 cm	16/month	8/month

Source: Guide to Eating Ontario Fish (2025). Advisory data is updated annually.

Lake Profile

Est. average depth5.7 m

Estimated from HydroLAKES v1.0 (Messager et al., 2016). Modeled geo-statistical estimate, not a direct survey measurement.

Boat Launches (1)

Lake St Joseph Boat Launch

2.9 kmProvincialParking

Map ↗

Source: Ontario MNR Fishing Access Points. Verify conditions before visiting.

Technical details

Years of record: 60
Source station: LAKE ST. JOSEPH ABOVE RAT RAPIDS DAM (04GA004)
Est. average depth: 5.7 m
Station status: Discontinued
Relationship type: controlled_system
Mapping confidence: medium
Today's normal range: 373.04–373.69 m
Same-date historical range: 371.46–374.31 m

Data source: ECCC Water Office — Station 04GA004. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.