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Rating depth structure for zander.
Recent public catches load as you reach this section.
268-acre lake in Finland. The lake tops out around 45 m. The depth chart comes from Finnish Environment Institute (Syke) bathymetric survey data, so the contours are survey-derived rather than computer-modeled. What the data behind the map says about each species, season by season:
Vesi piirtyy 110 hehtaarin laajuisena, rantaa 6.6 km. Rantaviiva on kohtalaisen rikkonainen (indeksi 1.8). Noin 25% pinnasta on matalampaa kuin ~5 m — siellä ruokaketju elää. Päästä päähän vesi mittaa noin 1.8 km, leveimmillään 1 km. Vesi sijaitsee alueella Joensuun seutukunta. Lähin kartoitettu vesi on Keskimmäinen Polvijärvi, 1.6 km itään.
Ilmainen interaktiivinen kalastuskartta — Iso Polvijärvi, Suomi: syvyyskäyrät todellisista syvyysmittauksista 45 metriin (148 jalkaa) asti, parhaat kalapaikat lajeille ahven, hauki, kuha ja muut. Syvyyskäyrät perustuvat Syken todellisiin syvyysmittauksiin (CC BY 4.0). Käytä karttaa suuntaa-antavana, älä koskaan navigointiin.
Come spring, look for european perch tight to the bank in 1 to 3.5 m. They move out to 2.5 to 8.5 m in summer and finish the year down in 3.5 to 10 m. If you only fish one area, make it Shallow bay flat: a weed flat around 1 m that scores prime in spring. Best bite is early morning. A drop-shot micro plastics or a small crankbait (perch pattern) is the honest summer answer here.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1 to 3.5 m | midday & dawn | Shallow bay flat (1 m) | Small jig + curly tail, Inline spinner #1-2 |
| Kesä | 2.5 to 8.5 m | dawn | Shallow bay flat (1 m) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Syksy | 3 to 10 m | midday | open water | Jigging spoon (small), Drop-shot on deep flats |
| Talvi | 3.5 to 10 m | midday & dawn | open water | Tungsten jig + maggots, Small balance jig |
Early season northern pike use the shallows, holding in 0.5 to 2.5 m. Summer is a 2.5 to 6 m game here, winter a 1.5 to 4.5 m one. The chart's best answer is Shallow bay flat — weed flat, 1 m, prime for spring. Best bite is early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 0.5 to 2.5 m | midday & dawn | Shallow bay flat (1 m) | #5 inline spinner, Spoon (red/white) |
| Kesä | 2.5 to 6 m | dawn & dusk | Main-lake point (2.5 m) | Bucktail, Weedless spoon over cabbage |
| Syksy | 2 to 5.5 m | midday & dawn | Main-lake point (2.5 m) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Talvi | 1.5 to 4.5 m | midday | Shallow bay flat (1 m) | Tip-ups, Large jigging spoon |
Come spring, look for zander tight to the bank in 1 to 4.5 m. They move out to 4.5 to 11 m in summer and finish the year down in 6 to 12 m. If you only fish one area, make it Main-lake point: a point around 2.5 m that scores prime in fall. Best bite is the evening and early morning. A vertical softbait over humps or a deep crankbait is the honest summer answer here.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1 to 4.5 m | dusk & dawn | Main-lake point (2.5 m) | Softbait on jighead (10-12 cm), Shallow crankbait at dusk |
| Kesä | 4.5 to 11 m | dusk & dawn | Main-lake point (2.5 m) | Vertical softbait over humps, Deep crankbait |
| Syksy | 3.5 to 12 m | dusk & night | Main-lake point (2.5 m) | Big softbait (12-16 cm) slow-rolled, Jigging spoon |
| Talvi | 6 to 12 m | dusk & dawn | open water | Vertical jig / mormyshka with bait, Slow blade bait |
In spring, lake whitefish run shallow here, mostly 4.5 to 14 m. Summer pushes them deeper, 12 to 27 m, and winter fish settle into 7.5 to 21 m. Break off the point is the standout, a drop-off at roughly 29 m, rated prime for summer lake whitefish. Time it for early morning. You won't need more than a blade bait vertical or a small jigging spoon most summer days.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 4.5 to 14 m | midday & dawn | open water | Small jig + waxworm, Blade bait (small) |
| Kesä | 12 to 27 m | dawn | Break off the point (29 m) | Blade bait vertical, Small jigging spoon |
| Syksy | 2.5 to 9 m | dusk | Main-lake point (2.5 m) | Small spoon (gold), Jig + plastic larva |
| Talvi | 7.5 to 21 m | midday & dawn | open water | Jigging spoon + bead chain, Tungsten jig + waxie |
Spring burbot on Iso Polvijärvi hold shallow, usually 7.5 to 21 m. By summer they slide out to 15 to 37 m, and by winter most fish are in 4.5 to 18 m. The chart's best answer is Deep basin — deep basin, 43 m, good for summer. Prime time lands in after dark and midday. The summer box starts with a heavy jig + cut bait.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 7.5 to 21 m | night & dusk | open water | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Kesä | 15 to 37 m | night & midday | Deep basin (43 m) | Heavy jig + cut bait |
| Syksy | 9 to 24 m | night & dusk | Break off the point (29 m) | Glow spoon + minnow head, Blade bait (slow) |
| Talvi | 4.5 to 18 m | night & dusk | open water | Glow tungsten + cut bait, Rattle spoon + minnow head |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 43 m.
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 Iso Polvijärvi specifically, so confirm the current rules before you fish.
Check the official Finland fishing regulations →
Iso Polvijärvi is about 148 ft (45 m) deep at its deepest point. The depth chart comes from Finnish Environment Institute (Syke) bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Iso Polvijärvi on syvimmillään noin 45 metriä (148 jalkaa). Syvyydet perustuvat todellisiin luotauksiin.
Anglers target european perch, northern pike, zander, lake whitefish, burbot on Iso Polvijärvi. 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.
Shallow bay flat is the top-rated area: a weed flat in about 4 ft of water that rates prime for european perch in spring. Open the map above to see every rated spot for each species and season.
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.
Fishing on Iso Polvijärvi 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.
Keskimmäinen Polvijärvi 1.6 km · Harinjärvi 3.2 km · Ala-Säynelampi 4.8 km · Leinonen 4.8 km · Matkalampi 8 km · Honkalampi 8 km · Iso-Reuhka 11.3 km · Kuorinka 12.9 km · Onkilampi 12.9 km · Kuorejärvi 12.9 km · Aittolampi 19.3 km · Mertajärvi 20.9 km
See how Iso Polvijärvi 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
More water nearby: Joensuun seutukunta fishing maps (204 charts). Browse all Finland fishing maps. See every water on DepthScout. Bathymetry credit: Finnish Environment Institute (Syke), Järvien ja jokien syvyysaineisto, CC BY 4.0. 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.