Dewfish Lake Depth Map & Fishing Spots (ON)

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Lake depth chart

Dewfish Lake, ON

Max 66 ft

Today's read

Where to start

Fall shiner run window is on — see the hatch outlook

Hatch outlook

Fall shiner runActive window

Typical here: Sep 1 – Oct 31 · same push on the Ontario side — Simcoe's shiners migrate shallow as the water cools, and the predators ride with them

adultdaylight for the jig bite; after dark the shiners stack under dock lights with walleyes and pike mixed right in — follow the bait, not the spot — millions of shiners move together and the predators ride with them; silver profile and flash matter

Concentrates hard but travels — the school (and the walleyes under it) can be off a river mouth one week and miles upriver the next.

Jig-and-minnow is the event's signature — a frozen emerald shiner on a 1/4 oz jig drifted along the run; silver jerkbaits and trolled crankbaits take the roaming fish; blade baits under the schools.

The event happens over river mouths and the first miles upriver, warming shallow shorelines, and rocky points where the displaced bait stacks

Next on this water

Hex (giant mayfly) · mayflyMay 25 – Aug 10 · in ~9 months

June mayfly hatch (walleye lakes) · mayflyJun 1 – Aug 10 · in ~9 months

Recommendations come from depth structure and seasonal species behavior. Treat them as a starting point, not a guarantee. Contours on this water are approximations. Never use for navigation. Always check local regulations.

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Recent catches at Dewfish Lake

Shared by DepthScout anglers. Exact spots stay private, always.

No shared catches here yet — be the first.Log a catch from the map above and share it to put Dewfish Lake on the board.

Fishing Dewfish Lake: what the data says

84-acre lake in Parry Sound District, Ontario. The lake tops out around 66 ft. This chart interpolates between a real shoreline and a known maximum depth. It will point you at likely water, but it is not a navigation product. Here is how the season plays out for each species, straight from the data behind the map.

The drawn water covers 84 acres wrapped in 2.1 miles of bank. A middling shoreline index (1.6) gives it some bays to work without being a maze. About 28% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. Tip to tip the water measures near 0.6 mi with a 0.4-mi widest point. It sits in Parry Sound District. Its nearest charted neighbour, Magnetawan Lake, is 1 mi to the northeast.

Yellow Perch fishing at Dewfish Lake

Spring puts yellow perch in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 10 to 30 ft; cold water stacks them in 15 to 35 ft. Shallow bay flat is the standout, a weed flat at roughly 6 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	Shallow bay flat (6 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Break off the point (30 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Break off the point (30 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Break off the point (30 ft)	Tungsten jig + spikes, Rattle spoon (small)

Notable structure

5 pieces of structure are mapped here — Deep basin, around 56 ft, is the deepest of them.

Deep basin: deep basin, around 56 ft
Break off the point: drop-off, around 30 ft
Main-lake point: point, around 17 ft
Secondary point: point, around 17 ft
Shallow bay flat: weed flat, around 6 ft

Dewfish Lake fishing regulations

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 Dewfish Lake specifically, so confirm the current rules before you fish.

Check the official Ontario fishing regulations →

Common questions

How deep is Dewfish Lake?

Dewfish Lake is about 66 ft (20 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.

What fish are in Dewfish Lake?

Anglers target yellow perch on Dewfish Lake.

Where is the best fishing spot on Dewfish Lake?

Shallow bay flat is the top-rated area: a weed flat in about 6 ft of water that rates prime for yellow perch in spring. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish Dewfish Lake?

For yellow perch, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.

What are the fishing regulations for Dewfish Lake?

Fishing on Dewfish Lake 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.

Nearby waters

Magnetawan Lake 1 mi · Little Eagle Lake 1 mi · Little Butt Lake 2 mi · Hambone Lake 2 mi · Salvelinus Lake 3 mi · South Branch Lake 3 mi · Daisy Lake 3 mi · Casey Lake 3 mi · Round Lake 4 mi · Middle Shanty Lake 4 mi · Pine Lake 4 mi · Mining Corporation Lake 4 mi

See how Dewfish Lake stacks up: best yellow perch lakes in Ontario

More water nearby: Parry Sound District fishing maps (441 charts). Browse all Ontario fishing maps or see every water on DepthScout. 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.