Salt water depth chart
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26,732-acre Österfjärden Finland coastal fishing map with an exact official national water-body boundary, EMODnet 2024 official Finnish hydrographic chart/DTM assessed contours, source-assessed fishing spots, official regional fish evidence, seasonal forage guidance, public-access review and current-rule links. Official Syke VHS 2022 named coastal water in Åland Sea. This child is clipped to the exact source polygon and a trip-scale ownership window. Coverage classes and uncertainty limits are disclosed; this is a fishing-planning chart, not a navigation chart or catch forecast. The water tops out around 28 m. The depth chart comes from EMODnet, with national hydrographic source-reference audit official hydrographic-chart depth models, so the contours are chart-derived rather than computer-modeled; no directly measured sounding coverage is claimed. What follows comes from the same scoring engine that paints the spots above.
Kartalla Österfjärden kattaa 10 818 hehtaaria, rantaviivaa 198.4 km, ja saaria on 318. Rantaviiva on voimakkaasti rikkonainen (indeksi 5.4) — lahtia ja niemiä kaikkialla, mikä moninkertaistaa kalastettavan reunan. Noin 25% pinnasta on matalampaa kuin ~5 m — siellä ruokaketju elää. Päästä päähän vesi mittaa noin 15 km, leveimmillään 13.8 km. Lähin kartoitettu vesi on Föglöfjärden - North, 9.7 km lounaaseen.
Ilmainen interaktiivinen kalastuskartta — Österfjärden, Suomi: virallisiin merikartta- ja syvyysmallilähteisiin tarkistetut syvyyskäyrät 28 metriin (93 jalkaa) asti, parhaat kalapaikat lajeille ahven, kuha, hauki ja muut. Syvyyskäyrät perustuvat Syken todellisiin syvyysmittauksiin (CC BY 4.0). Käytä karttaa suuntaa-antavana, älä koskaan navigointiin.
Occurrence evidence does not promise a catch or establish that retention is legal. Current seasons, closures, protected species, gear rules and local restrictions always control. The roster may combine exact-water monitoring with habitat-filtered official regional evidence; it does not imply that every species is equally abundant throughout the mapped section.
| Species | Evidence basis | Count / date |
|---|---|---|
| (European Perch) | official species listing | — |
| (Zander) | official species listing | — |
| (Northern Pike) | official species listing | — |
| (Atlantic Herring) | official species listing | — |
| (European Whitefish) | official species listing | — |
| (European Flounder) | official species listing | — |
| (Sea Trout) | official species listing | — |
| (European Smelt) | official species listing | — |
Official species-evidence source.
Spring puts european perch in skinny water — 1 to 3.5 m is the zone. As the season builds they drop to 2.5 to 8.5 m, wintering in 3.5 to 10 m. Spring european perch concentrate at Weed flat, a prime-rated weed flat around 1 m. Warm-month bites cluster around early morning. A drop-shot micro plastics or a small crankbait (perch pattern) covers the summer program.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1 to 3.5 m | midday & dawn | Weed flat (1 m) | Small jig + curly tail, Inline spinner #1-2 |
| Kesä | 2.5 to 8.5 m | dawn | Sharp break (5 m) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Syksy | 3 to 10 m | midday | Sharp break (5 m) | Jigging spoon (small), Drop-shot on deep flats |
| Talvi | 3.5 to 10 m | midday & dawn | Sharp break (5 m) | Tungsten jig + maggots, Small balance jig |
Spring puts zander in skinny water — 1 to 4.5 m is the zone. As the season builds they drop to 4.5 to 11 m, wintering in 6 to 12 m. Fall zander concentrate at Sharp break, a prime-rated drop-off around 5 m. Warm-month bites cluster around the evening and early morning. A vertical softbait over humps or a deep crankbait covers the summer program.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1 to 4.5 m | dusk & dawn | Rock reef (1.5 m) | Softbait on jighead (10-12 cm), Shallow crankbait at dusk |
| Kesä | 4.5 to 11 m | dusk & dawn | Sharp break (5 m) | Vertical softbait over humps, Deep crankbait |
| Syksy | 3.5 to 12 m | dusk & night | Sharp break (5 m) | Big softbait (12-16 cm) slow-rolled, Jigging spoon |
| Talvi | 6 to 12 m | dusk & dawn | Shoreline point (6 m) | Slow blade bait |
Spring puts northern pike in skinny water — 0.5 to 2.5 m is the zone. Warm water sends them out to 2.5 to 6 m; cold water stacks them in 1.5 to 4.5 m. Weed flat is the standout, a weed flat at roughly 1 m, rated prime for spring northern pike. Plan around early morning and the evening in the warm months. A bucktail or a weedless spoon over cabbage covers the summer program.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 0.5 to 2.5 m | midday & dawn | Weed flat (1 m) | #5 inline spinner, Spoon (red/white) |
| Kesä | 2.5 to 6 m | dawn & dusk | Sharp break (5 m) | Bucktail, Weedless spoon over cabbage |
| Syksy | 2 to 5.5 m | midday & dawn | Sharp break (5 m) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Talvi | 1.5 to 4.5 m | midday | Weed flat (2 m) | Large jigging spoon |
In spring, atlantic herring run shallow here, mostly 1.5 to 7.5 m. Summer pushes them deeper, 4.5 to 15 m, and winter fish settle into 6 to 18 m. Sharp break is the standout, a drop-off at roughly 5 m, rated good for summer atlantic herring. Time it for early morning and the evening. You won't need more than a herring feather rig or a small silver jig most summer days.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1.5 to 7.5 m | dawn & dusk | Rock reef (1.5 m) | Small herring feather rig, Micro jig rig |
| Kesä | 4.5 to 15 m | dawn & dusk | Sharp break (5 m) | Herring feather rig, Small silver jig |
| Syksy | 3 to 12 m | dawn & dusk | Sharp break (5 m) | Small feather rig, Compact silver spoon |
| Talvi | 6 to 18 m | midday | Sharp break (5 m) | Small silver jig, Sparse feather rig |
Come spring, look for european whitefish tight to the bank in 3 to 12 m. Expect a summer slide to 8.5 to 24 m, then a winter hold in 5.5 to 18 m. Start at Sharp break. It's a drop-off holding about 5 m of water and rates good come spring. Prime time lands in early morning and the evening. A small vertical spoon or a micro jig is the honest summer answer here.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 3 to 12 m | dawn & dusk | Sharp break (5 m) | Small silver spoon, Micro blade bait |
| Kesä | 8.5 to 24 m | dawn & dusk | Sharp break (21 m) | Small vertical spoon, Micro jig |
| Syksy | 1.5 to 11 m | dusk & dawn | Rock reef (1.5 m) | Small gold spoon, Micro jig |
| Talvi | 5.5 to 18 m | midday | Sharp break (5 m) | Small jigging spoon |
Early season european flounder use the shallows, holding in 1.5 to 7.5 m. Expect a summer slide to 2 to 11 m, then a winter hold in 4.5 to 15 m. Put Feeding flat first on the milk run — a feeding flat near 8 m that grades prime for summer. In summer the feeding windows fall in early morning and the evening. Tie on a bottom jig with spinner blade and you're in the game.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1.5 to 7.5 m | dusk | Feeding flat (8 m) | Small bucktail dragged on bottom |
| Kesä | 2 to 11 m | dawn & dusk | Feeding flat (8 m) | Bottom jig with spinner blade |
| Syksy | 2.5 to 12 m | dusk | Sharp break (5 m) | Compact bottom jig |
| Talvi | 4.5 to 15 m | midday | Sharp break (5 m) | Small bottom jig |
Österfjärden also holds sea trout (4.5 to 15 m in summer), european smelt (7.5 to 21 m in summer). Pick any of them on the map above for rated spots and bait picks.
21 pieces of structure are mapped here — Deepest basin, around 28 m, is the deepest of them.
No active municipality-, consortium-, or state-owned LIPAS fishing, boating, beach, swimming, canoe or motor-boat facility matched within 400 metres of this exact mapped shoreline. This is an access-evidence gap, not a claim that public access does not exist. Verify land ownership, local signs, parking, safety, permits and fishing permission before entry.
Private land and private launches need the owner's permission — please ask first.
Season dates, license requirements, and size and bag limits for Finland waters are set by the Kalastusrajoitus.fi (official current Finnish fishing-restriction service) — and special regulations can apply to Österfjärden specifically, so confirm the current rules before you fish. Check Kalastusrajoitus.fi, current protection periods and permit requirements before every Finnish coastal trip. Local no-fishing areas, river-mouth restrictions, protected species, minimum sizes, seasonal closures, gear rules, the fisheries-management fee and water-owner permissions may apply. A mapped hydrographic contour, fishing-spot marker or nearby LIPAS public facility is planning context only and never grants fishing, retention, shoreline entry, parking, launching or safe-navigation permission.
Check the official Finland fishing regulations →
Metsähallitus Eräluvat current fishing guidance →
Check special-area and water-specific rules →
Check official shore-access information →
Österfjärden is about 93 ft (28 m) deep at its deepest point. The depth chart comes from EMODnet, with national hydrographic source-reference audit official hydrographic-chart depth models, so the contours are chart-derived rather than computer-modeled; no directly measured sounding coverage is claimed.
Österfjärden on syvimmillään noin 28 metriä (93 jalkaa). Syvyydet perustuvat todellisiin luotauksiin.
Official coastal monitoring from Finland national fisheries and coastal monitoring agencies informs the european perch, zander, northern pike, atlantic herring, european whitefish, european flounder, sea trout, european smelt roster for Österfjärden. The mixed roster combines exact-water records where available with habitat-filtered regional evidence; not every species is documented at this exact water, and it is not a promise of equal abundance or a catch on a particular trip.
Weed flat is the top-rated area: a weed flat in about 4 ft of water that rates prime for european perch in spring. The interactive chart above rates every 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 Österfjärden is regulated by the Kalastusrajoitus.fi (official current Finnish fishing-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.
Föglöfjärden - North 6 mi · Mosshaga-Algersö - North 7 mi · Södra Delet - Central West 7 mi · Lumparn 9 mi · Södra Delet - Central 11 mi · Mosshaga-Algersö - South 11 mi · Föglöfjärden - South 12 mi · Södra Delet - North West 13 mi · Västergrundsfjärden - North East 13 mi · Simskälafjärden 14 mi · Skiftet Södra - Central West 14 mi · Kökarsfjärden - North West 15 mi
See how Österfjärden stacks up: best zander lakes in Finland · best northern pike lakes in Finland · best european perch lakes in Finland · best sea trout lakes in Finland
Browse all Finland fishing maps. See every water on DepthScout. Bathymetry credit: EMODnet, with national hydrographic source-reference audit EMODnet Bathymetry DTM 2024 mean-depth grid — official Finnish hydrographic chart/DTM assessed (Lowest Astronomical Tide (LAT); 98% from official hydrographic-chart depth models, 2% source-interpolated; no directly measured sounding coverage is claimed). 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.