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5,137-acre Baie de Saint-Brieuc. South West 4 France saltwater fishing map with official SHOM 100 m bathymetry, source-qualified fishing spots, official regional fish evidence, seasonal forage guidance, public shore-use context and current-rule links. The broad Saint-Brieuc bay, including estuary mouths, drying flats, rocky points and outer-bank approaches. This page covers the south west 4 angler-scale survey window. The water tops out around 93 ft. The depth chart comes from Shom (Service hydrographique et océanographique de la Marine) bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The season-by-season read for each species follows, from the map's own numbers.
The drawn water covers 5,138 acres wrapped in 12.7 miles of bank. Nearly circular (index 1.3), so the story is the bottom, not the bank. Littoral water — the productive band under ~15 ft — makes up 6% of this chart. Call it 4.9 mi long by 1.9 mi wide at the broadest reach. Baie de Saint-Brieuc - South West 3 sits 7 mi west — the closest neighbouring chart.
Baie de Saint-Brieuc — South West 4, France : carte SHOM officielle jusqu’à 28 m; spots pour bar commun, sole commune. Pour préparer la pêche, jamais pour naviguer. Les profondeurs et les points de structure proviennent de la grille bathymétrique officielle du Shom. Les données servent à préparer la pêche et ne doivent jamais être utilisées pour la navigation.
Regional occurrence supports a search target, not equal abundance, child-specific catch rate, retention permission or a promised catch. Current national, EU, regional, protected-area and species rules 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 |
|---|---|---|
| bar commun (European Seabass) | official species listing | — |
| sole commune (Common Sole) | official species listing | — |
| flet commun (European Flounder) | official species listing | — |
| plie commune (European Plaice) | official species listing | — |
| merlan (Whiting) | official species listing | — |
| orphie (Garfish) | official species listing | — |
| maquereau commun (Atlantic Mackerel) | official species listing | — |
| mulet lippu (Thick-lipped Grey Mullet) | official species listing | — |
| mulet cabot (Flathead Grey Mullet) | official species listing | — |
| barbue (Brill) | official species listing | — |
| raie bouclée (Thornback Ray) | official species listing | — |
| anguille européenne (European Eel) | official species listing | — |
| saumon atlantique (Atlantic Salmon) | official species listing | — |
Official species-evidence source.
Early season european seabass use the shallows, holding in 3 to 25 ft. Summer is a 2 to 30 ft game here, winter a 10 to 55 ft one. The chart's best answer is SHOM-grid current seam — current seam, 37 ft, prime for fall. Best bite is early morning and the evening. Tie on a surface lure or a paddle-tail soft plastic and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Shoreline point (22 ft) | Paddle-tail soft plastic, Shallow minnow plug |
| Summer | 2 to 30 ft | dawn & dusk | Shoreline point (22 ft) | Surface lure, Paddle-tail soft plastic |
| Fall | 4 to 40 ft | dawn & dusk | SHOM-grid current seam (37 ft) | Slim metal lure, Minnow plug |
| Winter | 10 to 55 ft | midday | SHOM-grid channel edge (47 ft) | Slow soft-plastic shad, Suspending minnow |
Start shallow in spring: common sole sit in 6 to 30 ft that time of year. They don't go far with the seasons — 3 to 30 ft covers summer, 20 to 70 ft covers winter. The spot to know is SHOM-grid flat, a feeding flat in about 9 ft of water that rates prime for common sole in spring. Warm-month bites cluster around the evening. Throw a light rolling-lead rig until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 6 to 30 ft | dusk | SHOM-grid flat (9 ft) | Tiny bottom jig |
| Summer | 3 to 30 ft | dusk | SHOM-grid flat (9 ft) | Light rolling-lead rig |
| Fall | 8 to 40 ft | dusk | SHOM-grid flat (9 ft) | Compact bottom jig |
| Winter | 20 to 70 ft | night | SHOM-grid channel edge (47 ft) |
In spring, european flounder run shallow here, mostly 5 to 25 ft. Midsummer fish sit out in 6 to 35 ft before dropping to 15 to 50 ft for winter. Spring european flounder concentrate at SHOM-grid flat, a prime-rated feeding flat around 9 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a bottom jig with spinner blade most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dusk | SHOM-grid flat (9 ft) | Small bucktail dragged on bottom |
| Summer | 6 to 35 ft | dawn & dusk | SHOM-grid flat (9 ft) | Bottom jig with spinner blade |
| Fall | 8 to 40 ft | dusk | SHOM-grid flat (9 ft) | Compact bottom jig |
| Winter | 15 to 50 ft | midday | Sharp break (53 ft) | Small bottom jig |
When the water first warms, european plaice slide up into 8 to 35 ft. Summer is a 6 to 40 ft game here, winter a 25 to 80 ft one. Start at SHOM-grid flat. It's a feeding flat holding about 9 ft of water and rates prime come spring. The feeding windows run early morning and the evening. Keep a light spooned bottom rig or a beaded trace rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dusk | SHOM-grid flat (9 ft) | Beaded flowing trace |
| Summer | 6 to 40 ft | dawn & dusk | SHOM-grid flat (9 ft) | Light spooned bottom rig, Beaded trace |
| Fall | 10 to 50 ft | dusk | SHOM-grid channel edge (47 ft) | Beaded bottom trace |
| Winter | 25 to 80 ft | midday | SHOM-grid channel edge (47 ft) |
When the water first warms, whiting slide up into 15 to 55 ft. Summer is a 20 to 70 ft game here, winter a 15 to 70 ft one. Start at SHOM-grid channel edge. It's a channel edge holding about 47 ft of water and rates prime come spring. The feeding windows run early morning. Keep a small vertical jig rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 55 ft | dawn & dusk | SHOM-grid channel edge (47 ft) | Small silver jig, Two-hook feather rig |
| Summer | 20 to 70 ft | dawn | SHOM-grid channel edge (47 ft) | Small vertical jig |
| Fall | 10 to 60 ft | dusk | SHOM-grid channel edge (47 ft) | Small silver jig, Sparse feather rig |
| Winter | 15 to 70 ft | dusk | SHOM-grid channel edge (47 ft) | Compact vertical jig |
Spring garfish on Baie de Saint-Brieuc - South West 4 hold shallow, usually 1 to 15 ft. By summer they slide out to 2 to 20 ft, and by winter most fish are in 20 to 60 ft. The chart's best answer is SHOM-grid shoal — gravel shoal, 17 ft, good for summer. Prime time lands in early morning and the evening. The summer box starts with a slim casting spoon or a surface-skipping fly.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 15 ft | dawn & midday | SHOM-grid shoal (17 ft) | Slim silver spoon, Small inline spinner |
| Summer | 2 to 20 ft | dawn & dusk | SHOM-grid shoal (17 ft) | Slim casting spoon, Surface-skipping fly |
| Fall | 8 to 30 ft | dawn & dusk | Shoreline point (22 ft) | Weighted slim spoon, Small silver jig |
| Winter | 20 to 60 ft | midday | SHOM-grid current seam (37 ft) |
Baie de Saint-Brieuc - South West 4 also holds atlantic mackerel (15 to 80 ft in summer), thick-lipped grey mullet (1 to 18 ft in summer), flathead grey mullet (1 to 22 ft in summer), brill (6 to 50 ft in summer), thornback ray (10 to 65 ft in summer), european eel (6 to 28 ft in summer), atlantic salmon (20 to 70 ft in summer). Pick any of them on the map above for rated spots and bait picks.
The chart marks 7 structure features on Baie de Saint-Brieuc - South West 4; the deepest is Deepest basin at about 93 ft.
Access data: European Environment Agency — 2025 Bathing Water Directive Sites (France). Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for France waters are set by the Légifrance (current French recreational sea-fishing minimum sizes) — and special regulations can apply to Baie de Saint-Brieuc - South West 4 specifically, so confirm the current rules before you fish. French recreational sea-fishing rules combine current national and European species measures with façade, prefectural, marine-protected-area, harbour and local access controls. Check live minimum sizes, quotas, seasonal or method closures, marking requirements and any no-take zone before every trip. A SHOM contour, fishing-spot marker or designated bathing-water lead is planning context only and never permission to fish, retain a catch, park, launch or enter restricted shore or port property.
Check the official France fishing regulations →
French Ministry for Ecological Transition — recreational sea fishing →
Check special-area and water-specific rules →
Check official shore-access information →
Baie de Saint-Brieuc - South West 4 is about 93 ft (28 m) deep at its deepest point. The depth chart comes from Shom (Service hydrographique et océanographique de la Marine) bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Official coastal monitoring from Ifremer CGFS and coastal estuary monitoring regional survey evidence informs the european seabass, common sole, european flounder, european plaice, whiting, garfish, atlantic mackerel, thick-lipped grey mullet, flathead grey mullet, brill, thornback ray, european eel, atlantic salmon roster for Baie de Saint-Brieuc - South West 4. 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.
SHOM-grid current seam is the top-rated area: a current seam in about 37 ft of water that rates prime for european seabass in fall. Open the map above to see every rated spot for each species and season.
For european seabass, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Baie de Saint-Brieuc - South West 4 is regulated by the Légifrance (current French recreational sea-fishing minimum sizes). Check the official France regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Baie de Saint-Brieuc - South West 3 7 mi · Golfe Normand-Breton - South West 1 7 mi · Golfe Normand-Breton - North West 1 10 mi · Baie de Saint-Brieuc - North West 3 12 mi · Saint-Malo and Rance - North West 13 mi · Baie de Saint-Brieuc - North West 4 14 mi · Baie de Saint-Brieuc - South West 2 16 mi · Golfe Normand-Breton - North West 2 16 mi · Baie de Saint-Brieuc - North West 2 19 mi · Baie de Saint-Brieuc - South West 1 22 mi · West Cotentin Coast - South 1 West 22 mi · Saint-Malo and Rance - North East 23 mi
See how Baie de Saint-Brieuc - South West 4 stacks up: best european flounder lakes in France · best garfish lakes in France · best european seabass lakes in France · best common sole lakes in France
Browse all France fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. 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.