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923-acre section. The long protected harbour off Penetanguishene at the SE corner of Georgian Bay: pike and bass in the weedy shallows, walleye and panfish on the drops. The lake tops out around 20 ft. The depth chart is built from real NOAA hydrographic survey soundings, so the humps, channels and drop-offs you see are measured, not guessed. What the data behind the map says about each species, season by season:
The drawn water covers 927 acres wrapped in 9.7 miles of bank. The 2.3 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. The shallow band under 15 ft claims about 86% of the surface — that's where the groceries are. The basin spans about 3.8 mi end to end and 1.3 mi across at its widest. It sits in Simcoe County. If the bite dies, St. Andrews Lake is 1 mi to the southeast.
Spring smallmouth bass on Georgian Bay - Penetanguishene Bay hold shallow, usually 3 to 12 ft. They move out to 6 to 20 ft in summer and finish the year down in 6 to 20 ft. Put Sharp break first on the milk run — a drop-off near 19 ft that grades prime for winter. The feeding windows run early morning and the evening. The summer box starts with a drop shot (goby/minnow) or a ned rig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Gravel shoal (5 ft) | Ned rig, Tube jig |
| Summer | 6 to 20 ft | dawn & dusk | Sharp break (19 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 6 to 20 ft | midday & dawn | Sharp break (19 ft) | Jerkbait, Blade bait |
| Winter | 6 to 20 ft | midday | Sharp break (19 ft) | Blade bait, Hair jig |
Early season largemouth bass use the shallows, holding in 2 to 10 ft. Summer is an 8 to 20 ft game here, winter a 6 to 20 ft one. The chart's best answer is Weed flat — weed flat, 4 ft, prime for spring. Best bite is early morning and the evening. Tie on a texas-rigged 10" worm or a deep-diving crankbait and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Weed flat (4 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Sharp break (19 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Weed flat (4 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 6 to 20 ft | midday | Sharp break (19 ft) | Blade bait, Jigging spoon |
Spring northern pike on Georgian Bay - Penetanguishene Bay hold shallow, usually 2 to 8 ft. They move out to 8 to 20 ft in summer and finish the year down in 5 to 15 ft. Put Weed flat first on the milk run — a weed flat near 4 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Weed flat (4 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Sharp break (19 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Sharp break (17 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Weed flat (6 ft) | Tip-ups, Large jigging spoon |
Spring muskellunge on Georgian Bay - Penetanguishene Bay hold shallow, usually 3 to 12 ft. By summer they slide out to 6 to 20 ft, and by winter most fish are in 6 to 20 ft. The chart's best answer is Sharp break — drop-off, 19 ft, prime for fall. Prime time lands in the evening and early morning. The summer box starts with a double-10 bucktail or a topwater (walk-the-dog / creeper).
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | Weed flat (4 ft) | Smaller bucktail (#8 blades), 6" glide bait |
| Summer | 6 to 20 ft | dusk & dawn | Weed flat (6 ft) | Double-10 bucktail, Topwater (walk-the-dog / creeper) |
| Fall | 5 to 20 ft | midday & dusk | Sharp break (19 ft) | Big rubber (Bull Dawg style), 10"+ glide bait |
| Winter | 6 to 20 ft | midday | Deepest basin (19 ft) | Large rubber, crawled slow |
Start shallow in spring: walleye sit in 4 to 15 ft that time of year. Warm water sends them out to 6 to 20 ft; cold water stacks them in 6 to 20 ft. Top water on the chart: Gravel shoal, a gravel shoal in the 5 ft range, prime in spring. Fish it in the evening and early morning and you'll meet the bite. Throw a crawler harness on bottom bouncer or a deep crankbait (trolled) until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Gravel shoal (5 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 6 to 20 ft | dusk & dawn | Sharp break (19 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 6 to 20 ft | dusk & night | Sharp break (19 ft) | Jigging rap, Jig + big minnow |
| Winter | 6 to 20 ft | dusk & dawn | Deepest basin (19 ft) | Jigging spoon + minnow head, Rattle bait |
Spring puts yellow perch in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 6 to 20 ft; cold water stacks them in 6 to 20 ft. Weed flat is the standout, a weed flat at roughly 4 ft, rated prime for spring yellow perch. Plan around early morning in the warm months. A drop-shot micro plastics or a small spoon tipped with worm covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Weed flat (4 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 6 to 20 ft | dawn | Deepest basin (19 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 6 to 20 ft | midday | Deepest basin (19 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 6 to 20 ft | midday & dawn | Deepest basin (19 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Georgian Bay - Penetanguishene Bay also holds crappie (6 to 20 ft in summer), pumpkinseed (2 to 10 ft in summer), rock bass (5 to 20 ft in summer). Pick any of them on the map above for rated spots and bait picks.
The chart marks 10 structure features on Georgian Bay - Penetanguishene Bay; the deepest is Deepest basin at about 19 ft.
Access data: Geospatial Ontario - Fishing Access Points. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Ontario waters are set by the Ontario fishing regulations (FMZ summary) — and special regulations can apply to Georgian Bay - Penetanguishene Bay specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Georgian Bay - Penetanguishene Bay is about 20 ft (6 m) deep at its deepest point. The depth chart here comes from real NOAA hydrographic surveys, so the contours reflect measured depths.
Anglers target smallmouth bass, largemouth bass, northern pike, muskellunge, walleye, yellow perch, crappie, pumpkinseed, rock bass on Georgian Bay - Penetanguishene Bay.
Sharp break is the top-rated area: a drop-off in about 19 ft of water that rates prime for smallmouth bass in winter. Open the map above to see every rated spot for each species and season.
For smallmouth bass, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Georgian Bay - Penetanguishene Bay is regulated by the Ontario fishing regulations (FMZ summary). Check the official Ontario regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
St. Andrews Lake 1 mi · Farlain Lake 2 mi · Georgian Bay - Midland Bay 4 mi · Macey Lake 4 mi · Kettle's Lake 4 mi · Little Lake 5 mi · Georgian Bay - Sturgeon Bay 5 mi · Georgian Bay - Severn Sound 5 mi · Bearshead Lake 9 mi · Barron's Lake 9 mi · Buck Lake 10 mi · Georgian Bay - Matchedash Bay 10 mi
See how Georgian Bay - Penetanguishene Bay stacks up: best largemouth bass lakes in Ontario · best smallmouth bass lakes in Ontario · best walleye lakes in Ontario · best northern pike lakes in Ontario
More water nearby: Simcoe County fishing maps (31 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: NOAA hydrographic surveys. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.