Salt water depth chart
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6,271-acre Boulogne Bay. South East 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. Boulogne-sur-Mer harbor approaches and the surrounding Channel bay, where tidal current crosses sand, rock and breakwater edges. This page covers the south east angler-scale survey window. The water tops out around 64 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. Every species below gets its seasonal read from the same numbers driving the chart.
Drawn out, this is 6,272 acres of water rimmed by 21.7 miles of bank. The shoreline is moderately structured (index 2) — enough points and pockets to pattern. Littoral water — the productive band under ~15 ft — makes up 25% of this chart. The basin spans about 10 mi end to end and 1.3 mi across at its widest. For a second option, Boulogne Bay - South West lies 5 mi west.
Boulogne Bay — South East, France : carte SHOM officielle jusqu’à 20 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 | — |
| plie commune (European Plaice) | official species listing | — |
| sole commune (Common Sole) | official species listing | — |
| flet commun (European Flounder) | official species listing | — |
| merlan (Whiting) | official species listing | — |
| orphie (Garfish) | official species listing | — |
| hareng (Atlantic Herring) | official species listing | — |
| barbue (Brill) | official species listing | — |
| raie bouclée (Thornback Ray) | official species listing | — |
| mulet lippu (Thick-lipped Grey Mullet) | official species listing | — |
| lieu jaune (Atlantic Pollock) | official species listing | — |
| cabillaud (Atlantic Cod) | official species listing | — |
Official species-evidence source.
The spring pattern is a shallow one: european seabass in 3 to 25 ft. Midsummer fish sit out in 2 to 30 ft before dropping to 10 to 55 ft for winter. The spot to know is SHOM-grid current seam, a current seam in about 26 ft of water that rates prime for european seabass in summer. Plan around early morning and the evening in the warm months. Summer baits: a surface lure or a paddle-tail soft plastic gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | SHOM-grid current seam (26 ft) | Paddle-tail soft plastic, Shallow minnow plug |
| Summer | 2 to 30 ft | dawn & dusk | SHOM-grid current seam (26 ft) | Surface lure, Paddle-tail soft plastic |
| Fall | 4 to 40 ft | dawn & dusk | SHOM-grid current seam (26 ft) | Slim metal lure, Minnow plug |
| Winter | 10 to 55 ft | midday | SHOM-grid channel edge (32 ft) | Slow soft-plastic shad, Suspending minnow |
When the water first warms, atlantic mackerel slide up into 5 to 45 ft. Summer is a 12 to 64 ft game here, winter a 16 to 64 ft one. Start at Deepest basin. It's a deep basin holding about 64 ft of water and rates prime come summer. The feeding windows run early morning and the evening. Keep a feather rig or a small vertical jig rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 45 ft | dawn & dusk | SHOM-grid current seam (26 ft) | Mackerel feather rig, Small silver jig |
| Summer | 12 to 64 ft | dawn & dusk | Deepest basin (64 ft) | Feather rig, Small vertical jig |
| Fall | 10 to 64 ft | dawn & dusk | SHOM-grid current seam (26 ft) | Compact silver jig, Sparse feather rig |
| Winter | 16 to 64 ft | midday | Deepest basin (64 ft) | Small deep jig |
The spring pattern is a shallow one: european plaice in 8 to 35 ft. As the season builds they drop to 6 to 40 ft, wintering in 19 to 64 ft. Top water on the chart: SHOM-grid flat, a feeding flat in the 6 ft range, prime in summer. Time it for early morning and the evening. Summer baits: a light spooned bottom rig or a beaded trace gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dusk | SHOM-grid flat (6 ft) | Beaded flowing trace |
| Summer | 6 to 40 ft | dawn & dusk | SHOM-grid flat (6 ft) | Light spooned bottom rig, Beaded trace |
| Fall | 10 to 50 ft | dusk | SHOM-grid channel edge (32 ft) | Beaded bottom trace |
| Winter | 19 to 64 ft | midday | Deepest basin (64 ft) |
Spring common sole on Boulogne Bay - South East hold shallow, usually 6 to 30 ft. Depth-wise the year is flat: 3 to 30 ft in summer, 18 to 64 ft once it turns cold. The chart's best answer is SHOM-grid flat — feeding flat, 6 ft, prime for spring. Prime time lands in the evening. The summer box starts with a light rolling-lead rig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 6 to 30 ft | dusk | SHOM-grid flat (6 ft) | Tiny bottom jig |
| Summer | 3 to 30 ft | dusk | SHOM-grid flat (6 ft) | Light rolling-lead rig |
| Fall | 8 to 40 ft | dusk | SHOM-grid channel edge (32 ft) | Compact bottom jig |
| Winter | 18 to 64 ft | night | Deepest basin (64 ft) |
When the water first warms, european flounder slide up into 5 to 25 ft. Summer is a 6 to 35 ft game here, winter a 15 to 50 ft one. Start at SHOM-grid flat. It's a feeding flat holding about 6 ft of water and rates prime come spring. The feeding windows run early morning and the evening. Keep a bottom jig with spinner blade rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dusk | SHOM-grid flat (6 ft) | Small bucktail dragged on bottom |
| Summer | 6 to 35 ft | dawn & dusk | SHOM-grid flat (6 ft) | Bottom jig with spinner blade |
| Fall | 8 to 40 ft | dusk | Sharp break (34 ft) | Compact bottom jig |
| Winter | 15 to 50 ft | midday | Sharp break (34 ft) | Small bottom jig |
The spring pattern is a shallow one: whiting in 15 to 55 ft. As the season builds they drop to 18 to 64 ft, wintering in 14 to 64 ft. Top water on the chart: SHOM-grid channel edge, a channel edge in the 32 ft range, prime in spring. Time it for early morning. Summer baits: a small vertical jig gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 55 ft | dawn & dusk | SHOM-grid channel edge (32 ft) | Small silver jig, Two-hook feather rig |
| Summer | 18 to 64 ft | dawn | Deepest basin (64 ft) | Small vertical jig |
| Fall | 10 to 60 ft | dusk | SHOM-grid channel edge (32 ft) | Small silver jig, Sparse feather rig |
| Winter | 14 to 64 ft | dusk | Deepest basin (64 ft) | Compact vertical jig |
Boulogne Bay - South East also holds garfish (2 to 20 ft in summer), atlantic herring (15 to 50 ft in summer), brill (6 to 50 ft in summer), thornback ray (10 to 64 ft in summer), thick-lipped grey mullet (1 to 18 ft in summer), atlantic pollock (5 to 64 ft in summer), atlantic cod (16 to 64 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Boulogne Bay - South East carries 9 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 64 ft down.
No official 2025 EEA designated bathing-water point matched within 400 metres of this SHOM-grid shoreline. This is an access-evidence gap, not a statement that public fishing access does not exist. Verify local fishing rights, land ownership, posted restrictions, protected areas, tidal and surf safety, and municipal 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 France waters are set by the Légifrance (current French recreational sea-fishing minimum sizes) — and special regulations can apply to Boulogne Bay - South East 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 →
Boulogne Bay - South East is about 64 ft (20 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, atlantic mackerel, european plaice, common sole, european flounder, whiting, garfish, atlantic herring, brill, thornback ray, thick-lipped grey mullet, atlantic pollock, atlantic cod roster for Boulogne Bay - South East. 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 26 ft of water that rates prime for european seabass in summer. Scroll up to the map for the complete spot list by 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 Boulogne Bay - South East 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.
Boulogne Bay - South West 5 mi · Boulogne Bay - North East 10 mi · Southern Opal Coast - North East 10 mi · Boulogne Bay - North West 11 mi · Southern Opal Coast - North West 13 mi · Calais and Cap Gris-Nez - South West 20 mi · Southern Opal Coast - South East 20 mi · Southern Opal Coast - South West 22 mi · Calais and Cap Gris-Nez - South East 25 mi · Calais and Cap Gris-Nez - North West 29 mi · Calais and Cap Gris-Nez - North East 31 mi · Baie de Somme - North West 31 mi
See how Boulogne Bay - South East stacks up: best atlantic herring lakes in France · best european flounder lakes in France · best garfish lakes in France · best european seabass 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.