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Fishing Petruma: what the data says
2,728-acre lake in Finland. The lake tops out around 98 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Here's the year, species by species, as the scoring engine sees it.
Petruma maps at 2,747 acres behind 24.6 miles of shoreline. With a shoreline index of 3.4, this water is all arms and coves — edge habitat well beyond its acreage. About 51% of the surface sits shallower than 15 ft — that's the weed-and-bait zone.
Ilmainen interaktiivinen kalastuskartta — Petruma, Suomi: syvyyskäyrät todellisista syvyysmittauksista 30 metriin (98 jalkaa) asti, parhaat kalapaikat lajeille ahven, hauki, kuha ja muut. Syvyyskartta on mallinnettu järven todellisesta rantaviivasta ja suurimmasta syvyydestä — käytä sitä suuntaa-antavana, älä koskaan navigointiin.
European Perch fishing at Petruma
Early season european perch use the shallows, holding in 3 to 12 ft. Summer is a 8 to 28 ft game here, winter a 12 to 33 ft one. The chart's best answer is Back-bay flat — weed flat, 4 ft, prime for spring. Best bite is early morning. Tie on a drop-shot micro plastics or a small crankbait (perch pattern) and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Back-bay flat (4 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 8 to 28 ft | dawn | Break off the point (5 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 10 to 33 ft | midday | Break off the point (5 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 12 to 33 ft | midday & dawn | Shallow feeding flat (26 ft) | Tungsten jig + maggots, Small balance jig |
Northern Pike fishing at Petruma
Come spring, look for northern pike tight to the bank in 2 to 8 ft. They move out to 8 to 20 ft in summer and finish the year down in 5 to 15 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 2 ft that scores prime in spring. Best bite is early morning and the evening. A bucktail or a weedless spoon over cabbage is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (2 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Weed flat (6 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Weed flat (6 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Weed flat (6 ft) | Tip-ups, Large jigging spoon |
Zander fishing at Petruma
Early season zander use the shallows, holding in 4 to 15 ft. Summer is a 15 to 35 ft game here, winter a 20 to 40 ft one. The chart's best answer is Break off the point — drop-off, 5 ft, prime for fall. Best bite is the evening and early morning. Tie on a vertical softbait over humps or a deep crankbait and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Main-lake point (5 ft) | Softbait on jighead (10-12 cm), Shallow crankbait at dusk |
| Summer | 15 to 35 ft | dusk & dawn | Shallow feeding flat (26 ft) | Vertical softbait over humps, Deep crankbait |
| Fall | 12 to 40 ft | dusk & night | Break off the point (5 ft) | Big softbait (12-16 cm) slow-rolled, Jigging spoon |
| Winter | 20 to 40 ft | dusk & dawn | Deep basin (94 ft) | Vertical jig / mormyshka with bait, Slow blade bait |
Lake Whitefish fishing at Petruma
The spring pattern is a shallow one: lake whitefish in 15 to 45 ft. As the season builds they drop to 40 to 90 ft, wintering in 25 to 70 ft. Top water on the chart: Deep basin, a deep basin in the 94-ft range, prime in summer. Time it for early morning. Summer baits: a blade bait vertical or a small jigging spoon gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Shallow feeding flat (26 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 40 to 90 ft | dawn | Deep basin (94 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Rock reef (2 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | Shallow feeding flat (26 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Burbot fishing at Petruma
Come spring, look for burbot tight to the bank in 25 to 70 ft. Expect a summer slide to 29 to 98 ft, then a winter hold in 15 to 60 ft. Start at Deep basin. It's a deep basin holding about 94 ft of water and rates prime come summer. Prime time lands in after dark and midday. A heavy jig + cut bait is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 25 to 70 ft | night & dusk | Deep basin (94 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 29 to 98 ft | night & midday | Deep basin (94 ft) | Heavy jig + cut bait |
| Fall | 30 to 80 ft | night & dusk | Deep basin (94 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 15 to 60 ft | night & dusk | Rock reef (2 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
Notable structure
- Deep basin: deep basin, around 94 ft
- Shallow feeding flat: feeding flat, around 26 ft
- Shallow feeding flat: feeding flat, around 26 ft
- Weed flat: weed flat, around 6 ft
- Main-lake point: point, around 5 ft
- Break off the point: drop-off, around 5 ft
- Back-bay flat: weed flat, around 4 ft
- Weed flat: weed flat, around 4 ft
- Secondary point: point, around 3 ft
- Weed flat: weed flat, around 3 ft
- Shallow bay flat: weed flat, around 2 ft
- Rock reef: rock pile, around 2 ft
Petruma fishing regulations
Season dates, license requirements, and size and bag limits for Finland waters are set by the Kalastusrajoitus.fi (official Finnish restriction service) — and special regulations can apply to Petruma specifically, so confirm the current rules before you fish.
Check the official Finland fishing regulations →
Common questions
How deep is Petruma?
Petruma is about 98 ft (30 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
What fish are in Petruma?
Anglers target zander, northern pike, european perch, lake whitefish, burbot on Petruma. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Where is the best fishing spot on Petruma?
Back-bay flat is the top-rated area: a weed flat in about 4 ft of water that rates prime for european perch in spring. Every other rated spot, per species and season, is on the map above.
When is the best time to fish Petruma?
For european 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 Petruma?
Fishing on Petruma is regulated by the Kalastusrajoitus.fi (official Finnish restriction service). Check the official Finland regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Nearby waters
Suuri Humalajärvi 4 mi · Suurijärvi 9 mi · Lammunjärvi 10 mi · Iso-Rummukka 15 mi · Ruokonen 16 mi · Suurijärvi 17 mi · Heinäjärvi 18 mi · Pieni Heinäjärvi 19 mi · Kilpijärvi 20 mi · Hepojärvi 20 mi · Kuorinka 20 mi · Palvalahti 21 mi
See how Petruma stacks up: best zander lakes in Finland · best northern pike lakes in Finland · best european perch lakes in Finland · best lake whitefish lakes in Finland
Browse all Finland fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.