Mindemoya Lake

Higher than usual

Water level is higher than usual for mid-September and holding steady.

Low (6.28m)Normal rangeHigh (6.59m)

Current Weather

2d ago

18°CCloudy

Wind NNW 15 km/h

Humidity 58%

A mix of sun and cloud

Environment Canada — Manitoulin - Blind River - Killarney

vs. Last Year

No data available

7-Day Trend

→Stable

Changed less than 2.0 cm over the past week

-1.1 cm over 7 days

Seasonal Position

76th percentile

Based on 18 years of records

Seasonal Outlook

Typical next 7 days

This lake usually holds steady over the next week.

Typical next 14 days

Over two weeks, levels typically drops slightly.

Tracking

This year is tracking near the seasonal norm.

Based on 18 years of seasonal patterns. Moderate historical coverage. This is a historical seasonal pattern, not a forecast.

Fish Consumption Advisories (5 species)

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

Cisco (Lake Herring)

Contaminant	Size	General pop.	Sensitive pop.
	20-25 cm	32/month	32/month
	25-30 cm	32/month	32/month
	30-35 cm	32/month	—
Mercury	30-35 cm	—	16/month

Lake Whitefish

Contaminant	Size	General pop.	Sensitive pop.
Selenium	35-40 cm	16/month	16/month
Selenium	25-30 cm	16/month	16/month
Selenium	40-45 cm	16/month	16/month
Selenium	30-35 cm	16/month	16/month

⚠Walleye

Contaminant	Size	General pop.	Sensitive pop.
	20-25 cm	32/month	—
	30-35 cm	32/month	—
	25-30 cm	32/month	—
	15-20 cm	32/month	—
Mercury	60-65 cm	8/month	Do not eat
Mercury	35-40 cm	16/month	8/month
Mercury	40-45 cm	16/month	8/month
Mercury	45-50 cm	12/month	4/month
Mercury	50-55 cm	12/month	4/month
Mercury	55-60 cm	8/month	4/month
Mercury	15-20 cm	—	16/month
Mercury	20-25 cm	—	16/month
Mercury	25-30 cm	—	16/month
Mercury	30-35 cm	—	16/month

White Sucker

Contaminant	Size	General pop.	Sensitive pop.
	30-35 cm	32/month	32/month
	35-40 cm	32/month	32/month
	40-45 cm	32/month	—
Mercury	45-50 cm	16/month	8/month
Mercury	40-45 cm	—	12/month

Yellow Perch

Contaminant	Size	General pop.	Sensitive pop.
	20-25 cm	32/month	—
	15-20 cm	32/month	—
Mercury	25-30 cm	16/month	8/month
Mercury	30-35 cm	8/month	4/month
Mercury	15-20 cm	—	16/month
Mercury	20-25 cm	—	16/month

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

Water Level — Last 30 Days

Technical details

Current level: 6.49 m
Reference value: 6.49 m (rolling_6h_mean)
Percentile for date: 76th percentile
Years of record: 18
Source station: MINDEMOYA LAKE AT MINDEMOYA (02CG005)
Est. average depth: —
Relationship type: direct_lake
Mapping confidence: medium
Today's normal range: 6.36–6.48 m
Same-date historical range: 6.28–6.59 m
30-day change: -3.4 cm
Data confidence: medium
Observed at: Sep 20, 2026
Last snapshot: Sep 20, 2026

Data source: ECCC Water Office — Station 02CG005. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.