LakeScout
Satellite view of Lake of Bays

Lake of Bays

Normal

Water level is right where you'd expect for mid-September and falling.

Low (10.16m)Normal rangeHigh (10.36m)

Current Weather

2d ago
19°CMainly Sunny
Wind N 9 km/h
Humidity 54%

A mix of sun and cloud

Environment Canada — Parry Sound - Muskoka

vs. Last Year

No data available

7-Day Trend

↓Falling

Down 5.5 cm over the past week

-5.5 cm over 7 days

Seasonal Position

30th percentile

Based on 22 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 moving slower than usual.

Based on 22 years of seasonal patterns. Moderate historical coverage. This is a historical seasonal pattern, not a forecast.

Fish Consumption Advisories (8 species)

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

⚠Burbot (Ling)
ContaminantSizeGeneral pop.Sensitive pop.
Mercury50-55 cm4/monthDo not eat
Mercury55-60 cm4/monthDo not eat
Mercury60-65 cm4/monthDo not eat
Mercury65-70 cm4/monthDo not eat
Mercury40-45 cm4/monthDo not eat
Mercury45-50 cm4/monthDo not eat
⚠Lake Trout
ContaminantSizeGeneral pop.Sensitive pop.
Mercury>75 cmDo not eat—
Mercury50-55 cm4/monthDo not eat
Mercury35-40 cm8/month4/month
Mercury45-50 cm8/monthDo not eat
Mercury40-45 cm8/month4/month
Mercury55-60 cm—Do not eat
Mercury25-30 cm16/month8/month
Mercury60-65 cm—Do not eat
Mercury30-35 cm—8/month
Mercury, PCB55-60 cm4/month—
Mercury, PCB65-70 cm—Do not eat
Mercury, PCB70-75 cm—Do not eat
Mercury, PCB>75 cm—Do not eat
Mercury, PCB30-35 cm16/month—
Mercury, PCB60-65 cm4/month—
PCB70-75 cm2/month—
PCB65-70 cm2/month—
Lake Whitefish
ContaminantSizeGeneral pop.Sensitive pop.
25-30 cm32/month—
20-25 cm32/month—
Mercury45-50 cm—4/month
Mercury50-55 cm—4/month
Mercury55-60 cm—4/month
Mercury25-30 cm—12/month
Mercury30-35 cm16/month8/month
Mercury35-40 cm—8/month
Mercury40-45 cm—4/month
Mercury20-25 cm—16/month
Mercury, PCB60-65 cm—4/month
Mercury, PCB50-55 cm12/month—
Mercury, PCB45-50 cm16/month—
Mercury, PCB40-45 cm16/month—
Mercury, PCB35-40 cm16/month—
PCB55-60 cm8/month—
PCB60-65 cm4/month—
⚠Northern Pike
ContaminantSizeGeneral pop.Sensitive pop.
Mercury>75 cm4/monthDo not eat
Mercury35-40 cm12/month4/month
Mercury40-45 cm12/month4/month
Mercury45-50 cm8/month4/month
Mercury50-55 cm8/month4/month
Mercury55-60 cm8/monthDo not eat
Mercury60-65 cm4/monthDo not eat
Mercury65-70 cm4/monthDo not eat
Mercury70-75 cm4/monthDo not eat
Rock Bass
ContaminantSizeGeneral pop.Sensitive pop.
Mercury15-20 cm16/month4/month
⚠Smallmouth Bass
ContaminantSizeGeneral pop.Sensitive pop.
Mercury20-25 cm12/month4/month
Mercury25-30 cm8/month4/month
Mercury30-35 cm8/monthDo not eat
Mercury35-40 cm4/monthDo not eat
Mercury40-45 cm4/monthDo not eat
Mercury45-50 cm2/monthDo not eat
Mercury50-55 cmDo not eatDo not eat
Mercury15-20 cm16/month8/month
Walleye
ContaminantSizeGeneral pop.Sensitive pop.
Mercury35-40 cm16/month4/month
Yellow Perch
ContaminantSizeGeneral pop.Sensitive pop.
Mercury15-20 cm16/month4/month
Source: Guide to Eating Ontario Fish (2025). Advisory data is updated annually.
Boat Launches (3)
Lake of Bays - Baysville
0.4 kmMunicipalParking
Map ↗
Dickie Lake
2.6 kmMunicipal
Map ↗
Echo Lake
4.8 kmMunicipal
Map ↗

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

Water Level — Last 30 Days

Technical details
Current level
10.23 m
Reference value
10.23 m (rolling_6h_mean)
Percentile for date
30th percentile
Years of record
22
Source station
LAKE OF BAYS AT BAYSVILLE (02EB019)
Est. average depth
—
Relationship type
direct_lake
Mapping confidence
medium
Today's normal range
10.23–10.28 m
Same-date historical range
10.16–10.36 m
30-day change
-5.3 cm
Data confidence
medium
Observed at
Sep 20, 2026
Last snapshot
Sep 20, 2026

Data source: ECCC Water Office — Station 02EB019. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.