Salt water depth chart
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58,738-acre Quiberon and Belle-Île. Middle 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. Quiberon Bay, the peninsula and Belle-Île approaches, spanning protected sand, rocky points and Atlantic current. This page covers the middle west 4 angler-scale survey window. The water tops out around 85 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. Species by species, here's what the data says the year looks like.
Traced from the shoreline, Quiberon and Belle-Île - Middle West 4 runs 58,675 acres with 45.4 miles of edge. At index 1.3 the outline is almost a bowl — read the depth changes, not the shoreline. The shallow band under 15 ft claims about 11% of the surface — that's where the groceries are. The basin spans about 14.1 mi end to end and 12.9 mi across at its widest. The nearest mapped water is Golfe du Morbihan - Middle East, 7 mi to the northeast.
Quiberon and Belle-Île — Middle West 4, France : carte SHOM officielle jusqu’à 26 m; spots pour bar commun, maquereau commun. 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 | — |
| maquereau commun (Atlantic Mackerel) | official species listing | — |
| lieu jaune (Atlantic Pollock) | official species listing | — |
| lieu noir (Saithe (Coalfish)) | official species listing | — |
| cabillaud (Atlantic Cod) | official species listing | — |
| lingue (Ling) | official species listing | — |
| orphie (Garfish) | official species listing | — |
| barbue (Brill) | official species listing | — |
| raie bouclée (Thornback Ray) | official species listing | — |
| sole commune (Common Sole) | official species listing | — |
| mulet lippu (Thick-lipped Grey Mullet) | official species listing | — |
| mulet cabot (Flathead Grey Mullet) | official species listing | — |
| anguille européenne (European Eel) | official species listing | — |
Official species-evidence source.
Start shallow in spring: european seabass sit in 3 to 25 ft that time of year. Summer pushes them deeper, 2 to 30 ft, and winter fish settle into 10 to 55 ft. The spot to know is SHOM-grid current seam, a current seam in about 34 ft of water that rates prime for european seabass in fall. Warm-month bites cluster around early morning and the evening. Throw a surface lure or a paddle-tail soft plastic until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Shoreline point (4 ft) | Paddle-tail soft plastic, Shallow minnow plug |
| Summer | 2 to 30 ft | dawn & dusk | SHOM-grid current seam (34 ft) | Surface lure, Paddle-tail soft plastic |
| Fall | 4 to 40 ft | dawn & dusk | SHOM-grid current seam (34 ft) | Slim metal lure, Minnow plug |
| Winter | 10 to 55 ft | midday | SHOM-grid channel edge (43 ft) | Slow soft-plastic shad, Suspending minnow |
Come spring, look for atlantic mackerel tight to the bank in 5 to 45 ft. Expect a summer slide to 15 to 80 ft, then a winter hold in 21 to 85 ft. Start at SHOM-grid current seam. It's a current seam holding about 34 ft of water and rates prime come fall. Prime time lands in early morning and the evening. A feather rig or a small vertical jig is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 45 ft | dawn & dusk | SHOM-grid current seam (34 ft) | Mackerel feather rig, Small silver jig |
| Summer | 15 to 80 ft | dawn & dusk | Deepest basin (85 ft) | Feather rig, Small vertical jig |
| Fall | 10 to 65 ft | dawn & dusk | SHOM-grid current seam (34 ft) | Compact silver jig, Sparse feather rig |
| Winter | 21 to 85 ft | midday | Deepest basin (85 ft) | Small deep jig |
Early season atlantic pollock use the shallows, holding in 7 to 85 ft. Even in summer they hold at 7 to 85 ft; winter keeps them in 14 to 85 ft. Put Rock reef first on the milk run — a rock pile near 5 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a surface plug or a baitfish swimbait and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 7 to 85 ft | dawn & dusk | Rock reef (5 ft) | Sandeel-pattern lure, Soft-plastic shad |
| Summer | 7 to 85 ft | dawn & dusk | Shoreline point (4 ft) | Surface plug, Baitfish swimbait |
| Fall | 8 to 85 ft | dawn | Rock reef (5 ft) | Metal jig, Minnow plug |
| Winter | 14 to 85 ft | midday | Sharp break (9 ft) | Slow metal jig, Weighted soft plastic |
Start shallow in spring: saithe (coalfish) sit in 8 to 85 ft that time of year. They don't go far with the seasons — 8 to 85 ft covers summer, 12 to 85 ft covers winter. The spot to know is SHOM-grid current seam, a current seam in about 34 ft of water that rates prime for saithe (coalfish) in spring. Warm-month bites cluster around early morning and the evening. Throw a speed jig or a heavy paddletail until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 85 ft | dawn & dusk | SHOM-grid current seam (34 ft) | Slim metal jig, Paddletail |
| Summer | 8 to 85 ft | dawn & dusk | Sharp break (9 ft) | Speed jig, Heavy paddletail |
| Fall | 8 to 85 ft | dawn & dusk | SHOM-grid current seam (34 ft) | Metal jig, Baitfish swimbait |
| Winter | 12 to 85 ft | midday | Deepest basin (85 ft) | Heavy vertical jig |
Early season atlantic cod use the shallows, holding in 17 to 85 ft. Even in summer they hold at 21 to 85 ft; winter keeps them in 19 to 85 ft. Put Deepest basin first on the milk run — a deep basin near 85 ft that grades prime for winter. In summer the feeding windows fall in early morning. Tie on a heavy metal jig or a large soft-plastic jig and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 17 to 85 ft | dawn | Rock reef (5 ft) | Diamond jig, Heavy bucktail |
| Summer | 21 to 85 ft | dawn | Deepest basin (85 ft) | Heavy metal jig, Large soft-plastic jig |
| Fall | 15 to 85 ft | dawn | Rock reef (5 ft) | Diamond jig, Bucktail with teaser |
| Winter | 19 to 85 ft | midday | Deepest basin (85 ft) | Heavy vertical jig |
Start shallow in spring: ling sit in 15 to 85 ft that time of year. They don't go far with the seasons — 14 to 85 ft covers summer, 16 to 85 ft covers winter. The spot to know is Deepest basin, a deep basin in about 85 ft of water that rates prime for ling in winter. Warm-month bites cluster around midday. Throw a heavy vertical jig until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 85 ft | midday | Sharp break (9 ft) | Heavy metal jig, Large soft-plastic jig |
| Summer | 14 to 85 ft | midday | Sharp break (9 ft) | Heavy vertical jig |
| Fall | 15 to 85 ft | midday | Sharp break (9 ft) | Long metal jig |
| Winter | 16 to 85 ft | midday | Deepest basin (85 ft) | Heavy deep jig |
Quiberon and Belle-Île - Middle West 4 also holds garfish (2 to 20 ft in summer), brill (6 to 50 ft in summer), thornback ray (10 to 65 ft in summer), common sole (3 to 30 ft in summer), thick-lipped grey mullet (1 to 18 ft in summer), flathead grey mullet (1 to 22 ft in summer), european eel (6 to 28 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Structure-wise the chart holds 8 features, led in depth by Deepest basin at roughly 85 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 Quiberon and Belle-Île - Middle 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 →
Quiberon and Belle-Île - Middle West 4 is about 85 ft (26 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 EVHOE and PELGAS regional survey evidence informs the european seabass, atlantic mackerel, atlantic pollock, saithe (coalfish), atlantic cod, ling, garfish, brill, thornback ray, common sole, thick-lipped grey mullet, flathead grey mullet, european eel roster for Quiberon and Belle-Île - Middle 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 34 ft of water that rates prime for european seabass in fall. The interactive chart above rates every 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 Quiberon and Belle-Île - Middle 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.
Golfe du Morbihan - Middle East 7 mi · Golfe du Morbihan - South East 9 mi · Quiberon and Belle-Île - Middle West 3 9 mi · Quiberon and Belle-Île - South West 4 11 mi · Quiberon and Belle-Île - North West 3 13 mi · Quiberon and Belle-Île - South West 3 14 mi · Vilaine Estuary - South Central 18 mi · Lorient and Groix Coast - South West 4 18 mi · Quiberon and Belle-Île - Middle West 2 18 mi · Quiberon and Belle-Île - South West 2 21 mi · Vilaine Estuary - South East 24 mi · Loire Estuary - South West 1 27 mi
See how Quiberon and Belle-Île - Middle West 4 stacks up: best garfish lakes in France · best european seabass lakes in France · best common sole lakes in France · best thick-lipped grey mullet 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.