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Fishing Kostamo: what the data says
309-acre lake in Finland. The lake tops out around 33 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 is how the season plays out for each species, straight from the data behind the map.
Kostamo maps at 309 acres behind 7.4 miles of shoreline. With a shoreline index of 3, this water is all arms and coves — edge habitat well beyond its acreage. About 62% of the surface sits shallower than 15 ft — that's the weed-and-bait zone.
Ilmainen interaktiivinen kalastuskartta — Kostamo, Suomi: syvyyskäyrät todellisista syvyysmittauksista 10 metriin (33 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 Kostamo
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 Shallow bay flat — weed flat, 5 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 | Shallow bay flat (5 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 8 to 28 ft | dawn | Break off the point (13 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 10 to 33 ft | midday | Deep basin (33 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 12 to 33 ft | midday & dawn | Deep basin (33 ft) | Tungsten jig + maggots, Small balance jig |
Northern Pike fishing at Kostamo
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 5 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 (5 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Back-bay flat (9 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Back-bay flat (9 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (5 ft) | Tip-ups, Large jigging spoon |
Zander fishing at Kostamo
Early season zander use the shallows, holding in 4 to 15 ft. Summer is a 10 to 33 ft game here, winter a 10 to 33 ft one. The chart's best answer is Break off the point — drop-off, 13 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 (7 ft) | Softbait on jighead (10-12 cm), Shallow crankbait at dusk |
| Summer | 10 to 33 ft | dusk & dawn | Break off the point (13 ft) | Vertical softbait over humps, Deep crankbait |
| Fall | 10 to 33 ft | dusk & night | Break off the point (13 ft) | Big softbait (12-16 cm) slow-rolled, Jigging spoon |
| Winter | 10 to 33 ft | dusk & dawn | Deep basin (33 ft) | Vertical jig / mormyshka with bait, Slow blade bait |
Lake Whitefish fishing at Kostamo
The spring pattern is a shallow one: lake whitefish in 10 to 33 ft. The depth story barely changes: 10 to 33 ft through summer, 10 to 33 ft in winter. Top water on the chart: Deep basin, a deep basin in the 33-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 | 10 to 33 ft | midday & dawn | Break off the point (13 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 10 to 33 ft | dawn | Deep basin (33 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (13 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 10 to 33 ft | midday & dawn | Deep basin (33 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Burbot fishing at Kostamo
Come spring, look for burbot tight to the bank in 10 to 33 ft. There's no big seasonal slide here — summer means 10 to 33 ft, winter 8 to 33 ft. Start at Deep basin. It's a deep basin holding about 33 ft of water and rates prime come spring. 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 | 10 to 33 ft | night & dusk | Deep basin (33 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 10 to 33 ft | night & midday | Deep basin (33 ft) | Heavy jig + cut bait |
| Fall | 10 to 33 ft | night & dusk | Deep basin (33 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 8 to 33 ft | night & dusk | Deep basin (33 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
Notable structure
- Deep basin: deep basin, around 33 ft
- Break off the point: drop-off, around 13 ft
- Back-bay flat: weed flat, around 9 ft
- Main-lake point: point, around 7 ft
- Shallow bay flat: weed flat, around 5 ft
- Secondary point: point, around 2 ft
Kostamo 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 Kostamo specifically, so confirm the current rules before you fish.
Check the official Finland fishing regulations →
Common questions
How deep is Kostamo?
Kostamo is about 33 ft (10 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 Kostamo?
Anglers target zander, northern pike, european perch, lake whitefish, burbot on Kostamo. 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 Kostamo?
Shallow bay flat is the top-rated area: a weed flat in about 5 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 Kostamo?
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 Kostamo?
Fishing on Kostamo 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
Herajärvi 2 mi · Sammalus 2 mi · Nurmijärvi 2 mi · Vuorinen 3 mi · Latvajärvi 3 mi · Untamojärvi 3 mi · Veikkolanjärvi 3 mi · Kaituri 4 mi · Ahjärvi 4 mi · Torsa - Pieni-Torsa 5 mi · Ylinen 5 mi · Suuri Paljärvi 6 mi
See how Kostamo 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.